116th Signal Radio Intelligence Company (1945)
A Concise History Of The U.S. Army Signal Corps (February 1991)
Hanyok, Robert J.: Spartans in Darkness: American SIGINT and the Indochina War, 1945-1975, 2002.
NSA: Soviet Strategic Forces Went on Alert Three Times during September-October 1962.
"U.S. Signal Intelligence Directive No. 18, USSID18, 20 October 1980", On Review 20 October 2010. By B.R. Inman, Vice Admiral, U.S. Navy, Director National Security Agency/Chief Central Security Service, NSA/CSS Fort George G. Meade, Virginia, U.S.A.