History of Codes and Ciphers in the U.S. During the Period Between World Wars: 1919-1929 (Cryptographic Series)
by  United States Army Security Agency Historical Section
Paperback
details (USA).
 
 
 
 
 
 
ISBN:  978-0-89412-039-8
ISBN-10: 0-89412-039-5
Aegean Park Pr · 1979