Top secret ultra
By: Peter Calvocoressi.
Edition: 1st American ed.
Publisher: Pantheon Books
Published: 1980
Place of publication: New York
Language: eng
Number of pages: 132
Subjects: Calvocoressi, Peter; World War, 1939-1945 -- Cryptography; World War, 1939-1945 -- Secret service -- Great Britain; World War, 1939-1945 -- Personal narratives, British
Notes: Includes index.