Title: The American black chamber
First published: 1931
Subjects: Cryptography, History, Military intelligence, Secret service, United States, United States. War Dept. Military Intelligence Division. Section No. 8, United States. War Dept. Military Intelligence Division. Section No. 8., World War, 1914-1918, United States. War Department. Military Intelligence Division. Section No. 8, World war, 1914-1918, secret service, United states, war department, United States. War Department. Military Intelligence Division. Section No. 8.
Places: United States