Essential matters : a history of the Cryptographic Branch of the People's Army of Viet-Nam, 1945-1975 : with a supplement on cryptography in the border guard (formerly the Armed Public Security Forces), 1959-1989, by David Winfred Gaddy et al.

Title:	Essential matters : a history of the Cryptographic Branch of the People's Army of Viet-Nam, 1945-1975 : with a supplement on cryptography in the border guard (formerly the Armed Public Security Forces), 1959-1989
Author:	Gaddy, David Winfred
Author:	United States. National Security Agency/Central Security Service. Center for Cryptologic History
Note:	Center for Cryptologic History, National Security Agency, 1994

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Subject:	1946 - 1975
Subject:	Cryptography
Subject:	Cryptography -- Vietnam -- History -- 20th century
Subject:	History
Subject:	Indochinese War (1946-1954)
Subject:	Indochinese War, 1946-1954 -- Cryptography
Subject:	Vietnam
Subject:	Vietnam War (1961-1975)
Subject:	Vietnam War, 1961-1975 -- Cryptography
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