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  1. 1
    by Winton, John, 1931-
    Published 1993
    Subjects “...World War, 1939-1945 Cryptography....”
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    Ultra in the Pacific : how breaking Japanese codes & cyphers affected naval operations against Japan 1941-45 /
  2. 2
    by Drea, Edward J., 1944-
    Published 1992
    Subjects
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    MacArthur's ULTRA : codebreaking and the war against Japan, 1942-1945 /

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