diff --git a/packages/frontend/src/App.js b/packages/frontend/src/App.js
index f821d3e..251199f 100644
--- a/packages/frontend/src/App.js
+++ b/packages/frontend/src/App.js
@@ -259,8 +259,10 @@ const App = () => {
           value={areacode}
         >
           <option value='fl'>Flensburg</option>
-          <option value='sl'>Kreis Schleswig-Flensburg</option>
+          <option value='lg'>Landkreis Lüneburg</option>
+          <option value='plö'>Kreis Plön</option>
           <option value='rz'>Kreis Herzogtum Lauenburg</option>
+          <option value='sl'>Kreis Schleswig-Flensburg</option>
         </select>
       </div>
 
@@ -309,8 +311,8 @@ const App = () => {
         <p>
           *) Die 7-Tage-Inzidenz wird mit einer Einwohnerzahl von{' '}
           {formatNum(areacodes[areacode].population)} errechnet (Quelle:{' '}
-          <a href='https://www.statistik-nord.de/fileadmin/Dokumente/Statistische_Berichte/bevoelkerung/A_I_2_S/A_I_2_vj_194_Zensus_SH.xlsx'>
-            Statistikamt Nord
+          <a href={areacodes[areacode].populationSourceUri}>
+            {areacodes[areacode].populationSourceLabel}
           </a>
           ).
         </p>
diff --git a/packages/frontend/src/areacodes.json b/packages/frontend/src/areacodes.json
index 30c2665..a35e5b1 100644
--- a/packages/frontend/src/areacodes.json
+++ b/packages/frontend/src/areacodes.json
@@ -1,16 +1,36 @@
 {
   "fl": {
     "population": 90164,
+    "populationSourceLabel": "Statistikamt Nord",
+    "populationSourceUri": "https://www.statistik-nord.de/",
     "sourceLabel": "flensburg.de",
     "sourceUri": "https://www.flensburg.de/Startseite/Informationen-zum-Coronavirus.php?object=tx,2306.5&ModID=7&FID=2306.20374.1"
   },
   "rz": {
     "population": 198019,
+    "populationSourceLabel": "Statistikamt Nord",
+    "populationSourceUri": "https://www.statistik-nord.de/",
     "sourceLabel": "kreis-rz.de",
     "sourceUri": "https://www.kreis-rz.de/Corona"
   },
+  "lg": {
+    "population": 184139,
+    "populationSourceLabel": "Landesamt für Statistik Niedersachsen",
+    "populationSourceUri": "https://www.statistik.niedersachsen.de/startseite/",
+    "sourceLabel": "spezial.lklg.net",
+    "sourceUri": "https://spezial.lklg.net/?p=64"
+  },
+  "plö": {
+    "population": 128686,
+    "populationSourceLabel": "Statistikamt Nord",
+    "populationSourceUri": "https://www.statistik-nord.de/",
+    "sourceLabel": "corona.rki.de",
+    "sourceUri": "https://corona.rki.de/"
+  },
   "sl": {
     "population": 201156,
+    "populationSourceLabel": "Statistikamt Nord",
+    "populationSourceUri": "https://www.statistik-nord.de/",
     "sourceLabel": "schleswig-flensburg.de",
     "sourceUri": "https://www.schleswig-flensburg.de/Leben-Soziales/Gesundheit/Coronavirus"
   }