Subject
History
8
Cryptography History
4
Electronic intelligence History
2
Intelligence service History
2
African Americans in the civil service
1
Cold War
1
Cryptography Automation History
1
Diplomatic and consular service, American
1
Electronic surveillance
1
Espionage, Soviet History
1
Intelligence service
1
Soviet Union Foreign relations
1
United States Foreign relations
1
United States Politics and government
1