William F. Friedman NSA Archive - Correspondence, Contract, Contract Bids, Photographs, and Diagrams, Supply and Installation of A Complete Electric Burglar Alarm System In Army Munitions Building, Washington, D.C., 1940

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Files W.F.F. Archive Patent and Equipment Records Correspondence, Contract, Contract Bids, Photographs, and Diagrams, Supply and Installation of A Complete Electric Burglar Alarm System In Army Munitions Building, Washington, D.C., 1940

Army Burglar Alarm System (Invitation No. R-4875/Contract No. W1049)

Document A71995

3.09 MiB

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Circuits and Operation of E.P.C. Local Burglar Alarm System AS Proposed for United States War Department Signal Groups

Document A4161638

1.72 MiB

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Locator Card: Cdr L. F. Safford, USN

Document A71748

22.68 KiB

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