Subject
Espionage, Soviet History
11
History
10
Spies
10
Espionage History
8
Cold War
6
Espionage, American History
6
Intelligence service History
5
World War, 1939-1945 Secret service
4
Espionage, American
3
Intelligence officers
3
Officials and employees
3
United States Foreign relations
3
Cold War Military intelligence
2
Communism History
2
Espionage, British History
2
Espionage, German History
2
Martial law
2
Military intelligence History
2
Poland Armed Forces Officers
2
Poland Politics and government
2
Soviet Union Foreign relations
2
Spies History
2
American fiction History and criticism
1
Anti-submarine warfare History
1
Art historians
1
Atomic bomb History
1
Berlin (Germany) History
1
Bletchley Park (Milton Keynes, England) History
1
Bucharest (Romania)
1
Bucharest (Romania) History
1
Civil rights movements History
1
Cold War Influence
1
Cold War in literature
1
Communication systems
1
Communism in literature
1
Congo (Democratic Republic) Relations
1
Cryptography History
1
Cuban Missile Crisis, 1962
1
Defectors
1
Dictatorship
1
Diplomatic and consular service, American
1
Electronic intelligence History
1
Espionage
1
Espionage, Russian History
1
Exiles
1
Exiles History
1
Families
1
Gay men
1
Great Britain Foreign relations
1
Historical fiction, American History and criticism
1
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