Die U-Flottille der deutschen Marine

By Ewerth, Hannes
(The German U-boat flotillas)
1988, Koehler Verlag, Herford
ISBN 3782203984
Hardcover, 106 pages, over 100 color and b&w photographs, tables
book is in German language

Descripton: Focus is on the German Navy today, but includes a short section on early U-boats.