Room 40
Subtitle: British naval intelligence 1914-18
By: by Patrick Beesly.
Edition: 1st American ed.
Publisher: Harcourt Brace Jovanovich
Published: 1982
Place of publication: San Diego
Language: eng
Number of pages: 338
Subjects: World War, 1914-1918 -- Cryptography.; World War, 1914-1918 -- Secret service -- Great Britain.
Other titles: Room forty.
Notes: Bibliography: p. [321]-323.
Includes index.