William F. Friedman NSA Archive - Memoranda and Reports, Hagelin Communications Security (COMSEC) Equipment, 1951-1955 - 4in1

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Files W.F.F. Archive Reports and Research Notes Memoranda and Reports, Hagelin Communications Security (COMSEC) Equipment, 1951-1955

Negotiations In Regard to Hagelin Machines

Document A60611

Personal Messages Concerning Hagelin Machines

Document A60602

Report of Visit to Crypto A.G (Hagelin) by William F. Friedman, Special Assistant to the Director, NSA

Document A60616