ULTRA, MAGIC, and the allies /

Bibliographic Details
Other Authors:	Mulligan, Timothy
Format:	Book
Language:	English
Published:	New York : Garland, 1989.
Series:	Covert warfare ; 1.
Subjects:	World War, 1939-1945 > Cryptography > Sources. World War, 1939-1945 > Secret service > Great Britain > Sources. World War, 1939-1945 > Secret service > United States > Sources.