William F. Friedman NSA Archive - Technical Paper, War Department, Office of the Chief Signal Officer, Field Codes Used by the German Army During the World War, by William F. Friedman, 1935

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Files W.F.F. Archive Publications Technical Paper, War Department, Office of the Chief Signal Officer, Field Codes Used by the German Army During the World War, by William F. Friedman, 1935

Field Codes Used by the German Army During the World War

Document A57075

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