William F. Friedman NSA Archive - War Department, Arlington Hall Message and Code Center, Procedures and Processing Times, 1943 - 4in1

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Files W.F.F. Archive Publications War Department, Arlington Hall Message and Code Center, Procedures and Processing Times, 1943

Processing of Messages Through War Department Code Center

Document A67463

Processing of Outgoing Messages

Document A67461

Report on the Process Time of 228-Q Received and SIGABA Messages

Document A67465