William F. Friedman NSA Archive - Post-War Development Work on Ciphering Devices by Boris Hagelin, 1951; Hagelin Documents, Correspondence, 1950-1956 - 4in1

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Files W.F.F. Archive Correspondence, Memoranda, and Personnel File Records Post-War Development Work on Ciphering Devices by Boris Hagelin, 1951; Hagelin Documents, Correspondence, 1950-1956

Extract from Letter Dated 24 Aug 1950 from Hagelin

Document A72380

Post-War Development Work on Ciphering Devices by Boris Hagelin

Document A72379

Transmittal of Photographs

Document A72371