The Ultra secret
By: F. W. Winterbotham.
Edition: 1st U.S. ed.
Publisher: Harper & Row
Published: 1974
Place of publication: New York
Language: eng
Number of pages: 199
Subjects: Winterbotham, F. W. 1897-; World War, 1939-1945 -- Cryptography; World War, 1939-1945 -- Secret service -- Great Britain; World War, 1939-1945 -- Personal narratives, British
Genres: Personal narratives, British.