Good reference from German side of Derflinger operations 

Hi:  An excellent source of information on Derflinger can be found in "Kiel and Jutland" by Commander Georg Von Hase.  This book by the gunnery officer of Derflinger at Jutland has been translated into English and is available in a number of editions.  I suggest it be added to the reference list.192.195.154.123   T. Schubert