History of Codes and Ciphers in the U.S. During the Period Between World Wars: 1919-1929 (Cryptographic Series, #22, Part 1)
Aegean Park Press, June 1979. First Edition. Soft Cover. Quarto. {8 & 1/2' x11'} Moderate tanning of spine. Interiors clean, unmarked. (186 pp.). More