Essential Matters : A History of the Cryptographic Branch of the People's Army of Viet-Nam, 1945-1975David W. Gaddy · First published 2012Open the Tome
A history of the Cryptographic Branch of the People's Army of Viet-Nam, 1945-1975David W. Gaddy · First published 1994Open the Tome
United States Cryptologic HistoryCenter for Cryptologic History, National Security Agency, David W. Gaddy · First published 1994Open the Tome
