The history of codes and ciphers in the United States prior to World War I /

Bibliographic Details

Corporate Author:	United States. Army Security Agency. Historical Section
Other Authors:	Barker, Wayne G.
Format:	Book
Language:	English
Published:	Laguna Hills, Calif. : Aegean Park Press, [1978]
Series:	Cryptographic series ; 20.
Subjects:	Cryptography. Ciphers.