- Espionage, Soviet[remove]26
- Spies7
- Intelligence service3
- Secret service3
- Soviet Union. Komitet gosudarstvennoi bezopasnosti3
- Nuclear energy2
- Propaganda, Soviet2
- United States. Central Intelligence Agency2
- Ames, Aldrich Hazen, 1941-1
- Art historians1
- Blunt, Anthony, 1907-19831
- Cryptography1
- Defectors1
- Diplomatic relations1
- Fuchs, Klaus Emil Julius, 1911-19881
- Gay men1
- Gold, Harry, 1910-19551
- Greenglass, David, 1922-1
- Greenglass, Ruth Lee (Printz)1
- Hambleton, Hugh1