diff --git a/api/sample.yaml b/api/sample.yaml
index 9331806..4ebb61f 100644
--- a/api/sample.yaml
+++ b/api/sample.yaml
@@ -12,6 +12,24 @@
         schema:
           type: string
         example: all
+      - name: last-id
+        description: last id of current page, if not given the results are displayed from start
+        in: query
+        schema:
+          type: string
+        example: 5ea0450ed851c30a90e70894
+      - name: to-page
+        description: relative change of pages, use negative values to get back, defaults to 0 (if last-id is given, the sample after is the first of the result, so the next page is selected automatically), works only together with page-size
+        in: query
+        schema:
+          type: string
+        example: 1
+      - name: page-size
+        description: number of items per page
+        in: query
+        schema:
+          type: string
+        example: 30
     responses:
       200:
         description: samples overview
@@ -25,6 +43,8 @@
         $ref: 'api.yaml#/components/responses/400'
       401:
         $ref: 'api.yaml#/components/responses/401'
+      404:
+        $ref: 'api.yaml#/components/responses/404'
       500:
         $ref: 'api.yaml#/components/responses/500'
 
diff --git a/api/schemas.yaml b/api/schemas.yaml
index 9704e08..99f7998 100644
--- a/api/schemas.yaml
+++ b/api/schemas.yaml
@@ -46,6 +46,9 @@ SampleRefs:
       $ref: 'api.yaml#/components/schemas/Id'
     user_id:
       $ref: 'api.yaml#/components/schemas/Id'
+    added:
+      type: string
+      example: 1970-01-01T00:00:00.000Z
 Sample:
   allOf:
     - $ref: 'api.yaml#/components/schemas/_Id'
diff --git a/data_import/import.js b/data_import/import.js
index e69de29..28614c8 100644
--- a/data_import/import.js
+++ b/data_import/import.js
@@ -0,0 +1,485 @@
+const csv = require('csv-parser');
+const fs = require('fs');
+const axios = require('axios');
+const {Builder} = require('selenium-webdriver');
+const chrome = require('selenium-webdriver/chrome');
+const pdfReader = require('pdfreader');
+const iconv = require('iconv-lite');
+
+const metadata = 'C:\\Users\\vle2fe\\Documents\\Data\\Rng_200622\\VZ.csv';  // metadata file
+const nmDocs = 'C:\\Users\\vle2fe\\Documents\\Data\\Rng_200622\\nmDocs';  // NormMaster Documents
+const dptFiles = 'C:\\Users\\vle2fe\\Documents\\Data\\Rng_200622\\DPT';  // Spectrum files
+let data = [];  // metadata contents
+let materials = {};
+let samples = [];
+let normMaster = {};
+
+// TODO: integrate measurement device information from DPT names using different users
+// TODO: supplier: other for supplierless samples
+
+main();
+
+async function main() {
+  if (0) {  // materials
+    await getNormMaster();
+    await importCsv();
+    await allMaterials();
+    fs.writeFileSync('./data_import/materials.json', JSON.stringify(materials));
+    await saveMaterials();
+  }
+  else if (0) {  // samples
+    await importCsv();
+    await allSamples();
+    await saveSamples();
+  }
+  else if (0) {  // DPT
+    await allDpts();
+  }
+  else if (1) {  // KF/VZ
+    await importCsv();
+    await allKfVz();
+  }
+  else if (0) {  // pdf test
+    console.log(await readPdf('N28_BN22-O010_2018-03-08.pdf'));
+  }
+}
+
+async function importCsv() {
+  await new Promise(resolve => {
+    fs.createReadStream(metadata)
+      .pipe(iconv.decodeStream('win1252'))
+      .pipe(csv())
+      .on('data', (row) => {
+        data.push(row);
+      })
+      .on('end', () => {
+        console.info('CSV file successfully processed');
+        resolve();
+      });
+  });
+}
+
+async function allDpts() {
+  let res = await axios({
+    method: 'get',
+    url: 'http://localhost:3000/template/measurements',
+    auth: {
+      username: 'admin',
+      password: 'Abc123!#'
+    }
+  });
+  const measurement_template = res.data.find(e => e.name === 'spectrum')._id;
+  res = await axios({
+    method: 'get',
+    url: 'http://localhost:3000/samples?status=all',
+    auth: {
+      username: 'admin',
+      password: 'Abc123!#'
+    }
+  });
+  const sampleIds = {};
+  res.data.forEach(sample => {
+    sampleIds[sample.number] = sample._id;
+  });
+  const regex = /.*?_(.*?)_(\d+|\d+_\d+).DPT/;
+  const dpts = fs.readdirSync(dptFiles);
+  for (let i in dpts) {
+    const regexRes = regex.exec(dpts[i])
+    if (regexRes && sampleIds[regexRes[1]]) {  // found matching sample
+      console.log(dpts[i]);
+      const f = fs.readFileSync(dptFiles + '\\' + dpts[i], 'utf-8');
+      const data = {
+        sample_id: sampleIds[regexRes[1]],
+        values: {},
+        measurement_template
+      };
+      data.values.dpt = f.split('\r\n').map(e => e.split(','));
+      await axios({
+        method: 'post',
+        url: 'http://localhost:3000/measurement/new',
+        auth: {
+          username: 'admin',
+          password: 'Abc123!#'
+        },
+        data
+      }).catch(err => {
+        console.log(dpts[i]);
+        console.error(err.response.data);
+      });
+    }
+  }
+}
+
+async function allKfVz() {
+  let res = await axios({
+    method: 'get',
+    url: 'http://localhost:3000/template/measurements',
+    auth: {
+      username: 'admin',
+      password: 'Abc123!#'
+    }
+  });
+  const kf_template = res.data.find(e => e.name === 'kf')._id;
+  const vz_template = res.data.find(e => e.name === 'vz')._id;
+  res = await axios({
+    method: 'get',
+    url: 'http://localhost:3000/samples?status=all',
+    auth: {
+      username: 'admin',
+      password: 'Abc123!#'
+    }
+  });
+  const sampleIds = {};
+  res.data.forEach(sample => {
+    sampleIds[sample.number] = sample._id;
+  });
+  for (let index in data) {
+    console.info(`${index}/${data.length}`);
+    let sample = data[index];
+    if (sample['Sample number'] !== '') {
+      if (sample['KF in Gew%']) {
+        await axios({
+          method: 'post',
+          url: 'http://localhost:3000/measurement/new',
+          auth: {
+            username: 'admin',
+            password: 'Abc123!#'
+          },
+          data: {
+            sample_id: sampleIds[sample['Sample number']],
+            measurement_template: kf_template,
+            values: {
+              'weight %': sample['KF in Gew%'],
+              'standard deviation': sample['Stabwn']
+            }
+          }
+        }).catch(err => {
+          console.log(sample['Sample number']);
+          console.error(err.response.data);
+        });
+      }
+      if (sample['VZ (ml/g)']) {
+        await axios({
+          method: 'post',
+          url: 'http://localhost:3000/measurement/new',
+          auth: {
+            username: 'admin',
+            password: 'Abc123!#'
+          },
+          data: {
+            sample_id: sampleIds[sample['Sample number']],
+            measurement_template: vz_template,
+            values: {
+              vz: sample['VZ (ml/g)']
+            }
+          }
+        }).catch(err => {
+          console.log(sample['Sample number']);
+          console.error(err.response.data);
+        });
+      }
+    }
+  }
+}
+
+async function allSamples() {
+  let res = await axios({
+    method: 'get',
+    url: 'http://localhost:3000/materials?status=all',
+    auth: {
+      username: 'admin',
+      password: 'Abc123!#'
+    }
+  });
+  const dbMaterials = {}
+  res.data.forEach(m => {
+    dbMaterials[m.name] = m;
+  })
+  res = await axios({
+    method: 'get',
+    url: 'http://localhost:3000/samples?status=all',
+    auth: {
+      username: 'admin',
+      password: 'Abc123!#'
+    }
+  });
+  const sampleColors = {};
+  res.data.forEach(sample => {
+    sampleColors[sample.number] = sample.color;
+  });
+
+
+  for (let index in data) {
+    console.info(`${index}/${data.length}`);
+    let sample = data[index];
+    if (sample['Sample number'] !== '' && sample['Supplier'] !== '' && sample['Granulate/Part'] !== '') {  // TODO: wait for decision about samples without suppliers/color/type
+      const material = dbMaterials[trim(sample['Material name'])];
+      if (!material) { // could not find material, skipping sample
+        continue;
+      }
+      console.log(sample['Material name']);
+      console.log(material._id);
+      samples.push({
+        number: sample['Sample number'],
+        type: sample['Granulate/Part'],
+        batch: sample['Charge/batch granulate/part'] || '',
+        material_id: material._id,
+        notes: {
+          comment: sample['Comments']
+        }
+      });
+      const si = samples.length - 1;
+      if (sample['Material number'] !== '' && material.numbers.find(e => e.number === sample['Material number'])) {  // TODO: fix because of false material/material number
+        samples[si].color = material.numbers.find(e => e.number === sample['Material number']).color;
+      }
+      else if (sample['Color'] && sample['Color'] !== '') {
+        samples[si].color = material.numbers.find(e => e.color.indexOf(sample['Color']) >= 0).color;
+      }
+      else if (sampleColors[sample['Sample number'].split('_')[0]]) {  // derive color from main sample for kf/vz
+        samples[si].color = sampleColors[sample['Sample number'].split('_')[0]];
+      }
+      else {  // TODO: no color information at all
+        samples.pop();
+      }
+    }
+  }
+}
+
+async function saveSamples() {
+  for (let i in samples) {
+    console.info(`${i}/${samples.length}`);
+    await axios({
+      method: 'post',
+      url: 'http://localhost:3000/sample/new',
+      auth: {
+        username: 'admin',
+        password: 'Abc123!#'
+      },
+      data: samples[i]
+    }).catch(err => {
+      console.log(samples[i]);
+      console.error(err.response.data);
+    });
+  }
+  console.info('saved all samples');
+}
+
+async function allMaterials() {
+  for (let index in data) {
+    let sample = data[index];
+    if (sample['Sample number'] !== '' && sample['Supplier'] !== '') {  // TODO: wait for decision about supplierless samples
+      sample['Material name'] = trim(sample['Material name']);
+      if (materials.hasOwnProperty(sample['Material name'])) {  // material already found at least once
+        if (sample['Material number'] !== '') {
+          if (materials[sample['Material name']].numbers.length === 0 || !materials[sample['Material name']].numbers.find(e => e.number === stripSpaces(sample['Material number']))) {  // new material number
+            if (materials[sample['Material name']].numbers.find(e => e.color === sample['Color'] && e.number === '')) {  // color already in list, only number missing
+              materials[sample['Material name']].numbers.find(e => e.color === sample['Color'] && e.number === '').number = stripSpaces(sample['Material number']);
+            }
+            else {
+              materials[sample['Material name']].numbers.push({color: sample['Color'], number: stripSpaces(sample['Material number'])});
+            }
+          }
+        }
+        else if (sample['Color'] !== '') {
+          if (!materials[sample['Material name']].numbers.find(e => e.color === stripSpaces(sample['Color']))) {  // new material color
+            materials[sample['Material name']].numbers.push({color: sample['Color'], number: ''});
+          }
+        }
+      }
+      else {  // new material
+        console.info(`${index}/${data.length}  ${sample['Material name']}`);
+        materials[sample['Material name']] = {
+          name: sample['Material name'],
+          supplier: sample['Supplier'],
+          group: sample['Material']
+        };
+        let tmp = /M(\d+)/.exec(sample['Reinforcing material']);
+        materials[sample['Material name']].mineral = tmp ? tmp[1] : 0;
+        tmp = /GF(\d+)/.exec(sample['Reinforcing material']);
+        materials[sample['Material name']].glass_fiber = tmp ? tmp[1] : 0;
+        tmp = /CF(\d+)/.exec(sample['Reinforcing material']);
+        materials[sample['Material name']].carbon_fiber = tmp ? tmp[1] : 0;
+        materials[sample['Material name']].numbers = await numbersFetch(sample);
+        console.log(materials[sample['Material name']]);
+      }
+    }
+  }
+}
+
+async function saveMaterials() {
+  const mKeys = Object.keys(materials)
+  for (let i in mKeys) {
+    await axios({
+      method: 'post',
+      url: 'http://localhost:3000/material/new',
+      auth: {
+        username: 'admin',
+        password: 'Abc123!#'
+      },
+      data: materials[mKeys[i]]
+    }).catch(err => {
+      console.log(materials[mKeys[i]]);
+      console.error(err.response.data);
+    });
+  }
+  console.info('saved all materials');
+}
+
+async function numbersFetch(sample) {
+  let nm = [];
+  let res = [];
+  if (sample['Material number']) {  // sample has a material number
+    nm = normMaster[stripSpaces(sample['Material number'])]? [normMaster[stripSpaces(sample['Material number'])]] : [];
+  }
+  else {  // try finding via material name
+    nm = Object.keys(normMaster).filter(e => normMaster[e].nameSpaceless === stripSpaces(sample['Material name'])).map(e => normMaster[e]);
+  }
+  if (nm.length > 0) {
+    for (let i in nm) {
+      // if (!fs.readdirSync(nmDocs).find(e => e.indexOf(nm[i].doc.replace(/ /g, '_')) >= 0)) {  // document not loaded
+      //   await getNormMasterDoc(nm[i].url.replace(/ /g, '%20'));
+      // }
+      // if (!fs.readdirSync(nmDocs).find(e => e.indexOf(nm[i].doc.replace(/ /g, '_')) >= 0)) {  // document not loaded
+      //   console.info('Retrying download...');
+      //   await getNormMasterDoc(nm[i].url.replace(/ /g, '%20'), 2.2);
+      // }
+      // if (!fs.readdirSync(nmDocs).find(e => e.indexOf(nm[i].doc.replace(/ /g, '_')) >= 0)) {  // document not loaded
+      //   console.info('Retrying download again...');
+      //   await getNormMasterDoc(nm[i].url.replace(/ /g, '%20'), 5);
+      // }
+      if (fs.readdirSync(nmDocs).find(e => e.indexOf(nm[i].doc.replace(/ /g, '_')) >= 0)) {  // document loaded
+        res = await readPdf(fs.readdirSync(nmDocs).find(e => e.indexOf(nm[i].doc.replace(/ /g, '_')) >= 0));
+      }
+      if (res.length > 0) {  // no results
+        break;
+      }
+      else if (i + 1 >= nm.length) {
+        console.error('Download failed!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!');
+      }
+    }
+  }
+  if (res.length === 0) {  // no results
+    if (sample['Color'] !== '' || sample['Material number'] !== '') {
+      return [{color: sample['Color'], number: sample['Material number']}];
+    }
+    else {
+      return [];
+    }
+  }
+  else {
+    if (!res.find(e => e.number === sample['Material number'])) {  // sometimes norm master does not include sample number even if listed
+      res.push({color: sample['Color'], number: sample['Material number']});
+    }
+    return res;
+  }
+}
+
+async function getNormMaster(fetchAgain = false) {
+  if (fetchAgain) {
+    console.info('fetching norm master...');
+    const res = await axios({
+      method: 'get',
+      url: 'http://rb-normen.bosch.com/cgi-bin/searchRBNorm4TradeName'
+    });
+
+    console.info('finding documents...');
+    let match;
+    // const regex = /<tr>.*?<td>.*?<\/span>(.*?)<\/td><td>(\d+)<\/td>.*?<a href="(.*?)"/gm;
+    const regex = /<tr>.*?<td>.*?<\/span>(.*?)<\/td><td>(\d+)<\/td><td>40.*?<a href="(.*?)".*?<\/a>(.*?)<\/td>/gm;  // only valid materials
+    do {
+      match = regex.exec(res.data);
+      if (match) {
+        normMaster[match[2]] = {name: match[1], nameSpaceless: stripSpaces(match[1]), number: match[2], url: match[3], doc: match[4]};
+      }
+    } while (match);
+    fs.writeFileSync('./data_import/normMaster.json', JSON.stringify(normMaster));
+  }
+  else {
+    normMaster = JSON.parse(fs.readFileSync('./data_import/normMaster.json'), 'utf-8');
+  }
+}
+
+function getNormMasterDoc(url, timing = 1) {
+  console.log(url);
+  return new Promise(async resolve => {
+    const options = new chrome.Options();
+    options.setUserPreferences({
+      "download.default_directory": nmDocs,
+      "download.prompt_for_download": false,
+      "download.directory_upgrade": true,
+      "plugins.always_open_pdf_externally": true
+    });
+    let driver = await new Builder().forBrowser('chrome').setChromeOptions(options).build();
+    let timeout = 7000 * timing;
+    try {
+      await driver.get(url);
+      if (await driver.getCurrentUrl() !== 'https://rb-wam-saml.bosch.com/tfim/sps/normmaster/saml20/login') {  // got document selection page
+        timeout = 11000 * timing;
+        await driver.executeScript('Array.prototype.slice.call(document.querySelectorAll(\'.functionlink\')).filter(e => e.innerText === \'English\')[0].click()').catch(() => {timeout = 0; });
+      }
+    }
+    finally {
+      setTimeout(async () => {  // wait until download is finished
+        await driver.quit();
+        resolve();
+      }, timeout);
+    }
+  });
+}
+
+function readPdf(file) {
+  return new Promise(async resolve => {
+    const countdown = 100;  // value for text timeout
+    let table = 0;      // > 0 when in correct table area
+    let rows = [];      // found table rows
+    let lastY = 0;      // y of last row
+    let lastX = 0;      // right x of last item
+    let lastText = '';  // text of last item
+    let lastLastText = '';  // text of last last item
+    await new pdfReader.PdfReader().parseFileItems(nmDocs + '\\' + file, (err, item) => {
+      if (item && item.text) {
+        if ((stripSpaces(lastLastText + lastText + item.text).toLowerCase().indexOf('colordesignationsupplier') >= 0) || (stripSpaces(lastLastText + lastText + item.text).toLowerCase().indexOf('colordesignatiomsupplier') >= 0)) {  // table area starts
+          table = countdown;
+        }
+        if (table > 0) {
+          // console.log(item);
+          // console.log(item.y - lastY);
+          // console.log(item.text);
+          if (item.y - lastY > 0.8 && Math.abs(item.x - lastX) > 5) {  // new row
+            lastY = item.y;
+            rows.push(item.text);
+          }
+          else {  // still the same row row
+            rows[rows.length - 1] += (item.x - lastX > 1.1 ? '$' : '') + item.text;  // push to row, detect if still same cell
+          }
+          lastX = (item.w * 0.055) + item.x;
+
+          if (/\d \d\d\d \d\d\d \d\d\d/.test(item.text)) {
+            table = countdown;
+          }
+          table --;
+          if (table <= 0 || item.text.toLowerCase().indexOf('release document') >= 0 || item.text.toLowerCase().indexOf('normative references') >= 0) {  // table area ended
+            table = -1;
+            // console.log(rows);
+            rows = rows.filter(e => /^\d{10}/m.test(stripSpaces(e)));  // filter non-table rows
+            resolve(rows.map(e => {return {color: e.split('$')[3], number: stripSpaces(e.split('$')[0])}; }));
+          }
+        }
+        lastLastText = lastText;
+        lastText = item.text;
+      }
+      if (!item && table !== -1) {  // document ended
+        rows = rows.filter(e => /^\d{10}/m.test(stripSpaces(e)));  // filter non-table rows
+        resolve(rows.map(e => {return {color: e.split('$')[3], number: stripSpaces(e.split('$')[0])}; }));
+      }
+    });
+  });
+}
+
+function stripSpaces(s) {
+  return s ? s.replace(/ /g,'') : '';
+}
+
+function trim(s) {
+  return s.replace(/(^\s+|\s+$)/gm, '');
+}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index d3b646e..93fdea0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -42,6 +42,7 @@
       "version": "7.8.3",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
       "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==",
+      "dev": true,
       "requires": {
         "@babel/highlight": "^7.8.3"
       }
@@ -213,6 +214,7 @@
       "version": "7.8.3",
       "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.8.3.tgz",
       "integrity": "sha512-PX4y5xQUvy0fnEVHrYOarRPXVWafSjTW9T0Hab8gVIawpl2Sj0ORyrygANq+KjcNlSSTw0YCLSNA8OyZ1I4yEg==",
+      "dev": true,
       "requires": {
         "chalk": "^2.0.0",
         "esutils": "^2.0.2",
@@ -393,12 +395,14 @@
     "@sindresorhus/is": {
       "version": "0.14.0",
       "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.14.0.tgz",
-      "integrity": "sha512-9NET910DNaIPngYnLLPeg+Ogzqsi9uM4mSboU5y6p8S5DzMTVEsJZrawi+BoDNUVBa2DhJqQYUFvMDfgU062LQ=="
+      "integrity": "sha512-9NET910DNaIPngYnLLPeg+Ogzqsi9uM4mSboU5y6p8S5DzMTVEsJZrawi+BoDNUVBa2DhJqQYUFvMDfgU062LQ==",
+      "dev": true
     },
     "@szmarczak/http-timer": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-1.1.2.tgz",
       "integrity": "sha512-XIB2XbzHTN6ieIjfIMV9hlVcfPU26s2vafYWQcZHWXHOxiaRZYEDKEwdl129Zyg50+foYV2jCgtrqSA6qNuNSA==",
+      "dev": true,
       "requires": {
         "defer-to-connect": "^1.0.1"
       }
@@ -406,12 +410,14 @@
     "@types/bcrypt": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/@types/bcrypt/-/bcrypt-3.0.0.tgz",
-      "integrity": "sha512-nohgNyv+1ViVcubKBh0+XiNJ3dO8nYu///9aJ4cgSqv70gBL+94SNy/iC2NLzKPT2Zt/QavrOkBVbZRLZmw6NQ=="
+      "integrity": "sha512-nohgNyv+1ViVcubKBh0+XiNJ3dO8nYu///9aJ4cgSqv70gBL+94SNy/iC2NLzKPT2Zt/QavrOkBVbZRLZmw6NQ==",
+      "dev": true
     },
     "@types/body-parser": {
       "version": "1.19.0",
       "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.0.tgz",
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           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
           "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+          "dev": true,
           "requires": {
             "color-name": "~1.1.4"
           }
@@ -3642,17 +3966,20 @@
         "color-name": {
           "version": "1.1.4",
           "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-          "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
+          "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+          "dev": true
         },
         "has-flag": {
           "version": "4.0.0",
           "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
-          "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ=="
+          "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+          "dev": true
         },
         "supports-color": {
           "version": "7.1.0",
           "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.1.0.tgz",
           "integrity": "sha512-oRSIpR8pxT1Wr2FquTNnGet79b3BWljqOuoW/h4oBhxJ/HUbX5nX6JSruTkvXDCFMwDPvsaTTbvMLKZWSy0R5g==",
+          "dev": true,
           "requires": {
             "has-flag": "^4.0.0"
           }
@@ -3663,6 +3990,7 @@
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-3.0.0.tgz",
       "integrity": "sha1-FrXK/Afb42dsGxmZF3gj1lA6yww=",
+      "dev": true,
       "requires": {
         "prepend-http": "^2.0.0"
       }
@@ -3722,6 +4050,7 @@
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-3.1.0.tgz",
       "integrity": "sha512-NsmoXalsWVDMGupxZ5R08ka9flZjjiLvHVAWYOKtiKM8ujtZWr9cRffak+uSE48+Ob8ObalXpwyeUiyDD6QFgg==",
+      "dev": true,
       "requires": {
         "string-width": "^4.0.0"
       },
@@ -3729,22 +4058,26 @@
         "ansi-regex": {
           "version": "5.0.0",
           "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
-          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg=="
+          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
+          "dev": true
         },
         "emoji-regex": {
           "version": "8.0.0",
           "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
-          "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A=="
+          "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+          "dev": true
         },
         "is-fullwidth-code-point": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
-          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg=="
+          "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
+          "dev": true
         },
         "string-width": {
           "version": "4.2.0",
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.0.tgz",
           "integrity": "sha512-zUz5JD+tgqtuDjMhwIg5uFVV3dtqZ9yQJlZVfq4I01/K5Paj5UHj7VyrQOJvzawSVlKpObApbfD0Ed6yJc+1eg==",
+          "dev": true,
           "requires": {
             "emoji-regex": "^8.0.0",
             "is-fullwidth-code-point": "^3.0.0",
@@ -3755,6 +4088,7 @@
           "version": "6.0.0",
           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
           "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
+          "dev": true,
           "requires": {
             "ansi-regex": "^5.0.0"
           }
@@ -3803,12 +4137,14 @@
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
     },
     "write-file-atomic": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
       "integrity": "sha512-AvHcyZ5JnSfq3ioSyjrBkH9yW4m7Ayk8/9My/DD9onKeu/94fwrMocemO2QAJFAlnnDN+ZDS+ZjAR5ua1/PV/Q==",
+      "dev": true,
       "requires": {
         "imurmurhash": "^0.1.4",
         "is-typedarray": "^1.0.0",
@@ -3824,7 +4160,8 @@
     "xdg-basedir": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-4.0.0.tgz",
-      "integrity": "sha512-PSNhEJDejZYV7h50BohL09Er9VaIefr2LMAf3OEmpCkjOi34eYyQYAXUTjEQtZJTKcF0E2UKTh+osDLsgNim9Q=="
+      "integrity": "sha512-PSNhEJDejZYV7h50BohL09Er9VaIefr2LMAf3OEmpCkjOi34eYyQYAXUTjEQtZJTKcF0E2UKTh+osDLsgNim9Q==",
+      "dev": true
     },
     "y18n": {
       "version": "4.0.0",
diff --git a/package.json b/package.json
index 777e274..e5ca620 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,8 @@
     "start": "node index.js",
     "dev": "nodemon -e ts,yaml --exec \"tsc && node dist/index.js || exit 1\"",
     "loadDev": "node dist/test/loadDev.js",
-    "coverage": "tsc && nyc --reporter=html --reporter=text mocha dist/**/**.spec.js --timeout 5000"
+    "coverage": "tsc && nyc --reporter=html --reporter=text mocha dist/**/**.spec.js --timeout 5000",
+    "import": "node data_import/import.js"
   },
   "keywords": [],
   "author": "",
@@ -45,9 +46,13 @@
     "@types/node": "^13.1.6",
     "@types/qs": "^6.9.1",
     "@types/serve-static": "^1.13.3",
+    "csv-parser": "^2.3.3",
+    "iconv-lite": "^0.6.0",
     "mocha": "^7.1.2",
     "nodemon": "^2.0.3",
     "nyc": "^15.0.1",
+    "pdfreader": "^1.0.7",
+    "selenium-webdriver": "^4.0.0-alpha.7",
     "should": "^13.2.3",
     "supertest": "^4.0.2",
     "tslint": "^5.20.1",
diff --git a/src/routes/sample.spec.ts b/src/routes/sample.spec.ts
index 9a483a4..4af6d55 100644
--- a/src/routes/sample.spec.ts
+++ b/src/routes/sample.spec.ts
@@ -10,6 +10,7 @@ import mongoose from 'mongoose';
 // TODO: generate output for ML in format DPT -> data, implement filtering, field selection
 // TODO: generate csv
 // TODO: write script for data import
+// TODO: allowed types: tension rod, part, granulate, other
 
 describe('/sample', () => {
   let server;
@@ -18,6 +19,7 @@ describe('/sample', () => {
   afterEach(done => TestHelper.afterEach(server, done));
   after(done => TestHelper.after(done));
 
+  // TODO: sort, added date filter, has measurements/condition filter
   describe('GET /samples', () => {
     it('returns all samples', done => {
       TestHelper.request(server, done, {
@@ -30,7 +32,7 @@ describe('/sample', () => {
         const json = require('../test/db.json');
         should(res.body).have.lengthOf(json.collections.samples.filter(e => e.status ===globals.status.validated).length);
         should(res.body).matchEach(sample => {
-          should(sample).have.only.keys('_id', 'number', 'type', 'color', 'batch', 'condition', 'material_id', 'note_id', 'user_id');
+          should(sample).have.only.keys('_id', 'number', 'type', 'color', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'added');
           should(sample).have.property('_id').be.type('string');
           should(sample).have.property('number').be.type('string');
           should(sample).have.property('type').be.type('string');
@@ -41,6 +43,7 @@ describe('/sample', () => {
           should(sample).have.property('material_id').be.type('string');
           should(sample).have.property('note_id');
           should(sample).have.property('user_id').be.type('string');
+          should(sample).have.property('added').be.type('string');
         });
         done();
       });
@@ -56,7 +59,7 @@ describe('/sample', () => {
         const json = require('../test/db.json');
         should(res.body).have.lengthOf(json.collections.samples.filter(e => e.status ===globals.status.validated).length);
         should(res.body).matchEach(sample => {
-          should(sample).have.only.keys('_id', 'number', 'type', 'color', 'batch', 'condition', 'material_id', 'note_id', 'user_id');
+          should(sample).have.only.keys('_id', 'number', 'type', 'color', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'added');
           should(sample).have.property('_id').be.type('string');
           should(sample).have.property('number').be.type('string');
           should(sample).have.property('type').be.type('string');
@@ -67,6 +70,7 @@ describe('/sample', () => {
           should(sample).have.property('material_id').be.type('string');
           should(sample).have.property('note_id');
           should(sample).have.property('user_id').be.type('string');
+          should(sample).have.property('added').be.type('string');
         });
         done();
       });
@@ -82,7 +86,7 @@ describe('/sample', () => {
         const json = require('../test/db.json');
         should(res.body).have.lengthOf(json.collections.samples.filter(e => e.status ===globals.status.new).length);
         should(res.body).matchEach(sample => {
-          should(sample).have.only.keys('_id', 'number', 'type', 'color', 'batch', 'condition', 'material_id', 'note_id', 'user_id');
+          should(sample).have.only.keys('_id', 'number', 'type', 'color', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'added');
           should(sample).have.property('_id').be.type('string');
           should(sample).have.property('number').be.type('string');
           should(sample).have.property('type').be.type('string');
@@ -92,10 +96,114 @@ describe('/sample', () => {
           should(sample).have.property('material_id').be.type('string');
           should(sample).have.property('note_id');
           should(sample).have.property('user_id').be.type('string');
+          should(sample).have.property('added').be.type('string');
         });
         done();
       });
     });
+    it('uses the given page size', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/samples?status=all&page-size=3',
+        auth: {basic: 'janedoe'},
+        httpStatus: 200
+      }).end((err, res) => {
+        if (err) return done(err);
+        should(res.body).have.lengthOf(3);
+        done();
+      });
+    });
+    it('returns results starting after last-id', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/samples?status=all&last-id=400000000000000000000002',
+        auth: {basic: 'janedoe'},
+        httpStatus: 200
+      }).end((err, res) => {
+        if (err) return done(err);
+        should(res.body[0]).have.property('_id', '400000000000000000000003');
+        should(res.body[1]).have.property('_id', '400000000000000000000004');
+        done();
+      });
+    });
+    it('returns the right page number', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/samples?status=all&to-page=2&page-size=2',
+        auth: {basic: 'janedoe'},
+        httpStatus: 200
+      }).end((err, res) => {
+        if (err) return done(err);
+        should(res.body[0]).have.property('_id', '400000000000000000000006');
+        done();
+      });
+    });
+    it('works with negative page numbers', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/samples?status=all&to-page=-1&page-size=2&last-id=400000000000000000000004',
+        auth: {basic: 'janedoe'},
+        httpStatus: 200
+      }).end((err, res) => {
+        if (err) return done(err);
+        should(res.body[0]).have.property('_id', '400000000000000000000001');
+        should(res.body[1]).have.property('_id', '400000000000000000000002');
+        done();
+      });
+    });
+    it('returns an empty array for a page number out of range', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/samples?status=all&to-page=100&page-size=2',
+        auth: {basic: 'janedoe'},
+        httpStatus: 200
+      }).end((err, res) => {
+        if (err) return done(err);
+        should(res.body).have.lengthOf(0);
+        should(res.body).be.eql([]);
+        done();
+      });
+    });
+    it('returns an empty array for a page number out of negative range', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/samples?status=all&to-page=-100&page-size=3&last-id=400000000000000000000004',
+        auth: {basic: 'janedoe'},
+        httpStatus: 200
+      }).end((err, res) => {
+        if (err) return done(err);
+        should(res.body).have.lengthOf(0);
+        should(res.body).be.eql([]);
+        done();
+      });
+    });
+    it('rejects a negative page size', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/samples?page-size=-3',
+        auth: {basic: 'janedoe'},
+        httpStatus: 400,
+        res: {status: 'Invalid body format', details: '"page-size" must be larger than or equal to 1'}
+      });
+    });
+    it('rejects an invalid last-id', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/samples?last-id=40000000000h000000000002',
+        auth: {basic: 'janedoe'},
+        httpStatus: 400,
+        res: {status: 'Invalid body format', details: '"last-id" with value "40000000000h000000000002" fails to match the required pattern: /[0-9a-f]{24}/'}
+      });
+    });
+    it('rejects a to-page without page-size', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/samples?to-page=3',
+        auth: {basic: 'janedoe'},
+        httpStatus: 400,
+        res: {status: 'Invalid body format', details: '"to-page" missing required peer "page-size"'}
+      });
+    });
     it('rejects an invalid state name', done => {
       TestHelper.request(server, done, {
         method: 'get',
@@ -127,7 +235,7 @@ describe('/sample', () => {
         let asyncCounter = res.body.length;
         should(res.body).have.lengthOf(json.collections.samples.filter(e => e.status ===globals.status.new).length);
         should(res.body).matchEach(sample => {
-          should(sample).have.only.keys('_id', 'number', 'type', 'color', 'batch', 'condition', 'material_id', 'note_id', 'user_id');
+          should(sample).have.only.keys('_id', 'number', 'type', 'color', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'added');
           should(sample).have.property('_id').be.type('string');
           should(sample).have.property('number').be.type('string');
           should(sample).have.property('type').be.type('string');
@@ -140,6 +248,7 @@ describe('/sample', () => {
           should(sample).have.property('material_id').be.type('string');
           should(sample).have.property('note_id');
           should(sample).have.property('user_id').be.type('string');
+          should(sample).have.property('added').be.type('string');
           SampleModel.findById(sample._id).lean().exec((err, data) => {
             should(data).have.property('status',globals.status.new);
             if (--asyncCounter === 0) {
@@ -161,7 +270,7 @@ describe('/sample', () => {
         let asyncCounter = res.body.length;
         should(res.body).have.lengthOf(json.collections.samples.filter(e => e.status === -1).length);
         should(res.body).matchEach(sample => {
-          should(sample).have.only.keys('_id', 'number', 'type', 'color', 'batch', 'condition', 'material_id', 'note_id', 'user_id');
+          should(sample).have.only.keys('_id', 'number', 'type', 'color', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'added');
           should(sample).have.property('_id').be.type('string');
           should(sample).have.property('number').be.type('string');
           should(sample).have.property('type').be.type('string');
@@ -174,6 +283,7 @@ describe('/sample', () => {
           should(sample).have.property('material_id').be.type('string');
           should(sample).have.property('note_id');
           should(sample).have.property('user_id').be.type('string');
+          should(sample).have.property('added').be.type('string');
           SampleModel.findById(sample._id).lean().exec((err, data) => {
             should(data).have.property('status',globals.status.deleted);
             if (--asyncCounter === 0) {
@@ -269,7 +379,7 @@ describe('/sample', () => {
     });
   });
 
-  describe('PUT /sample/{id}', () => {
+  describe('PUT /sample/{id}', () => {  // TODO: fix tests, work on /samples
     it('returns the right sample', done => {
       TestHelper.request(server, done, {
         method: 'put',
@@ -277,7 +387,7 @@ describe('/sample', () => {
         auth: {basic: 'janedoe'},
         httpStatus: 200,
         req: {},
-        res: {_id: '400000000000000000000001', number: '1', type: 'granulate', color: 'black', batch: '', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002'}
+        res: {_id: '400000000000000000000001', number: '1', type: 'granulate', color: 'black', batch: '', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002', added: '2004-01-10T13:37:04.000Z'}
       });
     });
     it('keeps unchanged properties', done => {
@@ -289,7 +399,7 @@ describe('/sample', () => {
         req: {type: 'granulate', color: 'black', batch: '', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000004', notes: {}}
       }).end((err, res) => {
         if (err) return done(err);
-        should(res.body).be.eql({_id: '400000000000000000000001', number: '1', type: 'granulate', color: 'black', batch: '', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002'});
+        should(res.body).be.eql({_id: '400000000000000000000001', number: '1', type: 'granulate', color: 'black', batch: '', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002', added: '2004-01-10T13:37:04.000Z'});
         SampleModel.findById('400000000000000000000001').lean().exec((err, data: any) => {
           if (err) return done (err);
           should(data).have.only.keys('_id', 'number', 'color', 'type', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'status', '__v');
@@ -316,7 +426,7 @@ describe('/sample', () => {
         req: {type: 'granulate'}
       }).end((err, res) => {
         if (err) return done(err);
-        should(res.body).be.eql({_id: '400000000000000000000001', number: '1', type: 'granulate', color: 'black', batch: '', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002'});
+        should(res.body).be.eql({_id: '400000000000000000000001', number: '1', type: 'granulate', color: 'black', batch: '', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002', added: '2004-01-10T13:37:04.000Z'});
         SampleModel.findById('400000000000000000000001').lean().exec((err, data: any) => {
           if (err) return done (err);
           should(data).have.property('status',globals.status.validated);
@@ -333,7 +443,7 @@ describe('/sample', () => {
         req: {condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}}
       }).end((err, res) => {
         if (err) return done(err);
-        should(res.body).be.eql({_id: '400000000000000000000001', number: '1', type: 'granulate', color: 'black', batch: '', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002'});
+        should(res.body).be.eql({_id: '400000000000000000000001', number: '1', type: 'granulate', color: 'black', batch: '', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002', added: '2004-01-10T13:37:04.000Z'});
         SampleModel.findById('400000000000000000000001').lean().exec((err, data: any) => {
           if (err) return done (err);
           should(data).have.property('status',globals.status.validated);
@@ -350,7 +460,7 @@ describe('/sample', () => {
         req: {notes: {comment: 'Stoff gesperrt', sample_references: []}}
       }).end((err, res) => {
         if (err) return done(err);
-        should(res.body).be.eql({_id: '400000000000000000000002', number: '21', type: 'granulate', color: 'natural', batch: '1560237365', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000001', note_id: '500000000000000000000001', user_id: '000000000000000000000002'});
+        should(res.body).be.eql({_id: '400000000000000000000002', number: '21', type: 'granulate', color: 'natural', batch: '1560237365', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000001', note_id: '500000000000000000000001', user_id: '000000000000000000000002', added: '2004-01-10T13:37:04.000Z'});
         SampleModel.findById('400000000000000000000002').lean().exec((err, data: any) => {
           if (err) return done (err);
           should(data).have.only.keys('_id', 'number', 'color', 'type', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'status', '__v');
@@ -627,7 +737,7 @@ describe('/sample', () => {
         auth: {basic: 'janedoe'},
         httpStatus: 200,
         req: {condition: {}},
-        res: {_id: '400000000000000000000006', number: 'Rng36', type: 'granulate', color: 'black', batch: '', condition: {}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002'}
+        res: {_id: '400000000000000000000006', number: 'Rng36', type: 'granulate', color: 'black', batch: '', condition: {}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002', added: '2004-01-10T13:37:04.000Z'}
       });
     });
     it('rejects an old version of a condition template', done => {
@@ -647,7 +757,7 @@ describe('/sample', () => {
         auth: {basic: 'admin'},
         httpStatus: 200,
         req: {condition: {p1: 36, condition_template: '200000000000000000000004'}},
-        res: {_id: '400000000000000000000004', number: '32', type: 'granulate', color: 'black', batch: '1653000308', condition: {p1: 36, condition_template: '200000000000000000000004'}, material_id: '100000000000000000000005', note_id: '500000000000000000000003', user_id: '000000000000000000000003'}
+        res: {_id: '400000000000000000000004', number: '32', type: 'granulate', color: 'black', batch: '1653000308', condition: {p1: 36, condition_template: '200000000000000000000004'}, material_id: '100000000000000000000005', note_id: '500000000000000000000003', user_id: '000000000000000000000003', added: '2004-01-10T13:37:04.000Z'}
       });
     });
     it('rejects an changing back to an empty condition', done => {
@@ -694,7 +804,7 @@ describe('/sample', () => {
         auth: {basic: 'admin'},
         httpStatus: 200,
         req: {},
-        res: {_id: '400000000000000000000001', number: '1', type: 'granulate', color: 'black', batch: '', condition: {condition_template: '200000000000000000000001', material: 'copper', weeks: 3}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002'}
+        res: {_id: '400000000000000000000001', number: '1', type: 'granulate', color: 'black', batch: '', condition: {condition_template: '200000000000000000000001', material: 'copper', weeks: 3}, material_id: '100000000000000000000004', note_id: null, user_id: '000000000000000000000002', added: '2004-01-10T13:37:04.000Z'}
       });
     });
     it('rejects requests from a read user', done => {
@@ -1085,7 +1195,7 @@ describe('/sample', () => {
         req: {color: 'black', type: 'granulate', batch: '1560237365', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material_id: '100000000000000000000001', notes: {comment: 'Testcomment', sample_references: [{sample_id: '400000000000000000000003', relation: 'part to this sample'}]}}
       }).end((err, res) => {
         if (err) return done (err);
-        should(res.body).have.only.keys('_id', 'number', 'color', 'type', 'batch', 'condition', 'material_id', 'note_id', 'user_id');
+        should(res.body).have.only.keys('_id', 'number', 'color', 'type', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'added');
         should(res.body).have.property('_id').be.type('string');
         should(res.body).have.property('number', 'Rng37');
         should(res.body).have.property('color', 'black');
@@ -1095,6 +1205,8 @@ describe('/sample', () => {
         should(res.body).have.property('material_id', '100000000000000000000001');
         should(res.body).have.property('note_id').be.type('string');
         should(res.body).have.property('user_id', '000000000000000000000002');
+        should(res.body).have.property('added').be.type('string');
+        should(new Date().getTime() - new Date(res.body.added).getTime()).be.below(1000);
         done();
       });
     });
@@ -1198,7 +1310,7 @@ describe('/sample', () => {
         req: {color: 'black', type: 'granulate', batch: '1560237365', material_id: '100000000000000000000001', notes: {comment: 'Testcomment', sample_references: [{sample_id: '400000000000000000000003', relation: 'part to this sample'}]}}
       }).end((err, res) => {
         if (err) return done (err);
-        should(res.body).have.only.keys('_id', 'number', 'color', 'type', 'batch', 'condition', 'material_id', 'note_id', 'user_id');
+        should(res.body).have.only.keys('_id', 'number', 'color', 'type', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'added');
         should(res.body).have.property('_id').be.type('string');
         should(res.body).have.property('number', 'Fe1');
         should(res.body).have.property('color', 'black');
@@ -1207,6 +1319,8 @@ describe('/sample', () => {
         should(res.body).have.property('material_id', '100000000000000000000001');
         should(res.body).have.property('note_id').be.type('string');
         should(res.body).have.property('user_id', '000000000000000000000004');
+        should(res.body).have.property('added').be.type('string');
+        should(new Date().getTime() - new Date(res.body.added).getTime()).be.below(1500);
         done();
       });
     });
@@ -1219,7 +1333,7 @@ describe('/sample', () => {
         req: {color: 'black', type: 'granulate', batch: '1560237365', material_id: '100000000000000000000001', notes: {comment: 'Testcomment', sample_references: [{sample_id: '400000000000000000000003', relation: 'part to this sample'}]}}
       }).end((err, res) => {
         if (err) return done (err);
-        should(res.body).have.only.keys('_id', 'number', 'color', 'type', 'batch', 'condition', 'material_id', 'note_id', 'user_id');
+        should(res.body).have.only.keys('_id', 'number', 'color', 'type', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'added');
         should(res.body).have.property('_id').be.type('string');
         should(res.body).have.property('number', 'Rng37');
         should(res.body).have.property('color', 'black');
@@ -1229,6 +1343,8 @@ describe('/sample', () => {
         should(res.body).have.property('material_id', '100000000000000000000001');
         should(res.body).have.property('note_id').be.type('string');
         should(res.body).have.property('user_id', '000000000000000000000002');
+        should(res.body).have.property('added').be.type('string');
+        should(new Date().getTime() - new Date(res.body.added).getTime()).be.below(1000);
         done();
       });
     });
@@ -1271,7 +1387,7 @@ describe('/sample', () => {
         req: {number: 'Rng34', color: 'black', type: 'granulate', batch: '1560237365', material_id: '100000000000000000000001', notes: {comment: 'Testcomment', sample_references: [{sample_id: '400000000000000000000003', relation: 'part to this sample'}]}},
       }).end((err, res) => {
         if (err) return done (err);
-        should(res.body).have.only.keys('_id', 'number', 'color', 'type', 'batch', 'condition', 'material_id', 'note_id', 'user_id');
+        should(res.body).have.only.keys('_id', 'number', 'color', 'type', 'batch', 'condition', 'material_id', 'note_id', 'user_id', 'added');
         should(res.body).have.property('_id').be.type('string');
         should(res.body).have.property('number', 'Rng34');
         should(res.body).have.property('color', 'black');
@@ -1281,6 +1397,8 @@ describe('/sample', () => {
         should(res.body).have.property('material_id', '100000000000000000000001');
         should(res.body).have.property('note_id').be.type('string');
         should(res.body).have.property('user_id', '000000000000000000000003');
+        should(res.body).have.property('added').be.type('string');
+        should(new Date().getTime() - new Date(res.body.added).getTime()).be.below(1000);
         done();
       });
     });
diff --git a/src/routes/sample.ts b/src/routes/sample.ts
index d28e725..24f33cf 100644
--- a/src/routes/sample.ts
+++ b/src/routes/sample.ts
@@ -25,22 +25,43 @@ router.get('/samples', (req, res, next) => {
   const {error, value: filters} = SampleValidate.query(req.query);
   if (error) return res400(error, res);
 
-  let conditions;
-
+  let status;
   if (filters.hasOwnProperty('status')) {
     if(filters.status === 'all') {
-      conditions = {$or: [{status: globals.status.validated}, {status: globals.status.new}]}
+      status = {$or: [{status: globals.status.validated}, {status: globals.status.new}]}
     }
     else {
-      conditions = {status: globals.status[filters.status]};
+      status = {status: globals.status[filters.status]};
     }
   }
   else {  // default
-    conditions = {status: globals.status.validated};
+    status = {status: globals.status.validated};
+  }
+  const query = SampleModel.find(status);
+
+  if (filters['page-size']) {
+    query.limit(filters['page-size']);
   }
 
-  SampleModel.find(conditions).lean().exec((err, data) => {
+  if (filters['last-id']) {
+    if (filters['to-page'] && filters['to-page'] < 0) {
+      query.lte('_id', mongoose.Types.ObjectId(filters['last-id']));  // TODO: consider sorting
+      query.sort({_id: -1});
+    }
+    else {
+      query.gt('_id', mongoose.Types.ObjectId(filters['last-id']));  // TODO: consider sorting
+    }
+  }
+
+  if (filters['to-page']) {
+    query.skip(Math.abs(filters['to-page']) * filters['page-size']);  // TODO: check order for negative numbers
+  }
+
+  query.lean().exec((err, data) => {
     if (err) return next(err);
+    if (filters['to-page'] && filters['to-page'] < 0) {
+      data.reverse();
+    }
     res.json(_.compact(data.map(e => SampleValidate.output(e))));  // validate all and filter null values from validation errors
   })
 });
diff --git a/src/routes/validate/sample.ts b/src/routes/validate/sample.ts
index 1da56da..f1f17f9 100644
--- a/src/routes/validate/sample.ts
+++ b/src/routes/validate/sample.ts
@@ -44,7 +44,11 @@ export default class SampleValidate {
             Joi.date()
           )
         )
-    })
+    }),
+
+    added: Joi.date()
+      .iso()
+      .min('1970-01-01T00:00:00.000Z')
   };
 
   static input (data, param) {  // validate input, set param to 'new' to make all attributes required
@@ -85,6 +89,7 @@ export default class SampleValidate {
   }
 
   static output (data, param = 'refs') {  // validate output and strip unwanted properties, returns null if not valid
+    data.added = data._id.getTimestamp();
     data = IdValidate.stringify(data);
     let joiObject;
     if (param === 'refs') {
@@ -97,7 +102,8 @@ export default class SampleValidate {
         condition: this.sample.condition,
         material_id: IdValidate.get(),
         note_id: IdValidate.get().allow(null),
-        user_id: IdValidate.get()
+        user_id: IdValidate.get(),
+        added: this.sample.added
       };
     }
     else if(param === 'details') {
@@ -123,7 +129,10 @@ export default class SampleValidate {
 
   static query (data) {
     return Joi.object({
-      status: Joi.string().valid('validated', 'new', 'all')
-    }).validate(data);
+      status: Joi.string().valid('validated', 'new', 'all'),
+      'last-id': IdValidate.get(),
+      'to-page': Joi.number().integer(),
+      'page-size': Joi.number().integer().min(1)
+    }).with('to-page', 'page-size').validate(data);
   }
 }
\ No newline at end of file