William F. Friedman NSA Archive - the Contribution of the Cryptographic Bureaus In the World War, War Department, Office of the Chief Signal Officer, Reprinted from Signal Corps Bulletin Nos. 75-81, 1935

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Files W.F.F. Archive Publications the Contribution of the Cryptographic Bureaus In the World War, War Department, Office of the Chief Signal Officer, Reprinted from Signal Corps Bulletin Nos. 75-81, 1935

the Contribution of the Cryptographic Bureaus In the World War; by Yves Gylden-War Department Publication -

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