- Espionage, Soviet26
- Spies10
- Intelligence service4
- Espionage3
- Secret service3
- Soviet Union. Komitet gosudarstvennoi bezopasnosti3
- Defectors2
- Nuclear energy2
- Propaganda, Soviet2
- United States. Central Intelligence Agency2
- Ames, Aldrich Hazen, 1941-1
- Art historians1
- Blunt, Anthony, 1907-19831
- Cryptography1
- Diplomatic relations1
- Espionage, British1
- Fuchs, Klaus Emil Julius, 1911-19881
- Gay men1
- Gold, Harry, 1910-19551
- Greenglass, David, 1922-1