U-boat Intelligence, 1914-1918

By Grant, Robert McQueen
1969, Archon Books, Hamden CT
ISBN 0208008985
Hardcover, 192 pages, 12 photos, 1 sketch, 1 facsimile, 9 charts

Descripton: An overview and analysis of intelligence regarding U-boat operations gained from intercepted transmissions, prisoners, and wrecks by Germany's World War I opponents.