Ultra goes to war : the first account of World War II's greatest secret based on official documents / Ronald Lewin.

Bibliographic Details
Main Author:	Lewin, Ronald
Language:	English
Published:	New York : McGraw-Hill, [1978], ©1978.
Subjects:	World War, 1939-1945 > Secret service > Great Britain.
Physical Description:	397 pages, 6 unnumbered leaves of plates : illustrations ; 24 cm
Format:	Book