Der U-Bootkrieg 1939-1945

Deutsche U-Boot-Verluste von September 1939 bis Mai 1945

By Busch, Rainer and Röll, Hans Joachim
(The U-boat War 1939-1945: German U-boat losses from September 1939 to May 1945)
1999, Mittler & Sohn Verlag
ISBN 3813205142
462 pages
book is in German language