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- catalog abstract "Bletchley Park, a modest estate some fifty miles northwest of London, was the site of one of the closest-held and longest-kept secrets of World War II. Most Secret Ultra, renamed Top Secret Ultra when America joined the venture, conveyed a staggering amount of intelligence on enemy movements and intentions to Allied field commanders. This was obtained by steady monitoring of German radio transmissions, and was made possible by a major feat in scientific detection: the breaking of the German Enigma machine ciphers."--Book Jacket.".
- catalog contributor b1390610.
- catalog created "c1980.".
- catalog date "1980".
- catalog date "c1980.".
- catalog dateCopyrighted "c1980.".
- catalog description "Bletchley Park, a modest estate some fifty miles northwest of London, was the site of one of the closest-held and longest-kept secrets of World War II. Most Secret Ultra, renamed Top Secret Ultra when America joined the venture, conveyed a staggering amount of intelligence on enemy movements and intentions to Allied field commanders. This was obtained by steady monitoring of German radio transmissions, and was made possible by a major feat in scientific detection: the breaking of the German Enigma machine ciphers."--Book Jacket.".
- catalog description "Foreword -- Bletchley Park -- The Enigma Machine and the Poles -- Three Stages to Daylight -- The Uses of Ultra -- A Verdict -- Appendix One: Note on Documents -- Appendix Two: Strength Returns by German Units.".
- catalog description "Includes index.".
- catalog extent "132 p., [8] leaves of plates :".
- catalog hasFormat "Top secret ultra.".
- catalog identifier "0394511549 :".
- catalog isFormatOf "Top secret ultra.".
- catalog issued "1980".
- catalog issued "c1980.".
- catalog language "eng".
- catalog publisher "New York : Pantheon Books,".
- catalog relation "Top secret ultra.".
- catalog spatial "Great Britain.".
- catalog subject "Calvocoressi, Peter.".
- catalog subject "D810.C88 C34 1980".
- catalog subject "World War, 1939-1945 Cryptography.".
- catalog subject "World War, 1939-1945 Personal narratives, British.".
- catalog subject "World War, 1939-1945 Personal narratives, English.".
- catalog subject "World War, 1939-1945 Secret service Great Britain.".
- catalog tableOfContents "Foreword -- Bletchley Park -- The Enigma Machine and the Poles -- Three Stages to Daylight -- The Uses of Ultra -- A Verdict -- Appendix One: Note on Documents -- Appendix Two: Strength Returns by German Units.".
- catalog title "Top secret ultra / Peter Calvocoressi.".
- catalog type "Personal narratives British. fast".
- catalog type "text".