diff --git a/oaipmh-core/src/main/java/info/textgrid/middleware/IdentifierListDelivererDC.java b/oaipmh-core/src/main/java/info/textgrid/middleware/IdentifierListDelivererDC.java
index aaa51deb31a376136ba2770b957847a1bad434e9..d0e88e7bda696e3fde3d962ee5df3fddf1118b28 100644
--- a/oaipmh-core/src/main/java/info/textgrid/middleware/IdentifierListDelivererDC.java
+++ b/oaipmh-core/src/main/java/info/textgrid/middleware/IdentifierListDelivererDC.java
@@ -187,8 +187,9 @@ public class IdentifierListDelivererDC extends IdentifierListDelivererAbstract {
       if (this.dariah) {
 
         System.out.println("  ##  dateOfObjectCreation  -->  " + this.dateOfObjectCreation);
-        System.out
-            .println("  ##  identifier  -->  " + hit.getSourceAsMap().get(this.identifierField));
+
+        System.out.println("  ##  keys     -->  " + hit.getSourceAsMap().keySet());
+        System.out.println("  ##  entries  -->  " + hit.getSourceAsMap().entrySet());
 
         try {
           this.datestamp = hit.getSourceAsMap().get(this.dateOfObjectCreation).toString();