Military cryptanalysis /

Bibliographic Details
Main Author:	Friedman, William F. (William Frederick), 1891-1969 (Author)
Format:	Government Document eBook
Language:	English
Published:	Washington : United States Government Printing Office, 1939-1941.
Subjects:	Ciphers. Cryptography. World War, 1939-1945 > Military intelligence > United States. World War, 1939-1945 > Cryptography > Sources.
Online Access:	https://purl.fdlp.gov/GPO/gpo73996

Description
Item Description:	At head of title: War Department. Office of the Chief Signal Officer, Washington. "Prepared under the direction of the Chief Signal Officer." "Declassified and approved for release by NSA on 09-19-2005 pursuant to E.O. 12958, as amended." Formerly restricted.
Physical Description:	1 online resource (4 volumes) : illustrations
Bibliography:	Includes bibliographical references and indexes.