--- a/src/main/java/de/mpiwg/web/jsp/BooksPage.java	Wed May 03 19:51:43 2017 +0200
+++ b/src/main/java/de/mpiwg/web/jsp/BooksPage.java	Wed May 03 19:53:16 2017 +0200
@@ -28,6 +28,8 @@
 import de.mpiwg.web.books.SortBooksByPeriod;
 import de.mpiwg.web.books.SortBooksByStartYear;
 import de.mpiwg.web.books.SortBooksByTocCorrection;
+import de.mpiwg.web.books.SortBooksByYear;
+import de.mpiwg.web.books.SortBooksBySource;
 
 public class BooksPage extends AbstractJSPPage{
 
@@ -101,7 +103,7 @@
 					(StringUtils.isEmpty(bookNameFilter) || StringUtils.contains(book.getName(), bookNameFilter)) &&
 					(StringUtils.isEmpty(dynastyFilter) || StringUtils.contains(book.getDynasty(), dynastyFilter)) &&
 					(StringUtils.isEmpty(adminTypeFilter) || StringUtils.contains(book.getAdmin_type(), adminTypeFilter)) &&
-          (StringUtils.isEmpty(yearFilter) || StringUtils.contains(book.getYear(), yearFilter)) &&
+          (StringUtils.isEmpty(yearFilter) || book.getYear() == Integer.parseInt(yearFilter)) &&
 					(StringUtils.isEmpty(sourceFilter) || StringUtils.contains(book.getSource(), sourceFilter))
 					){
 						String lastEditor = new String();
@@ -211,7 +213,7 @@
 	}
 
 	public String getSourceFilter() {
-		return yearFilter;
+		return sourceFilter;
 	}