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Subject
- Foreign relations27
- History22
- Politics and government16
- Diplomats15
- World War, 1939-194512
- Social conditions11
- Secret service6
- Spies6
- Political prisoners5
- Communism4
- Economic conditions4
- Intelligence officers4
- Intelligence service4
- Soviet Union. Obʺedinennoe gosudarstvennoe politicheskoe upravlenie4
- Chicherin, G. (Georgiĭ), 1872-19363
- Diplomatic history3
- Krivitsky, W. G. (Walter G.), 1899-19413
- Political purges3
- Politicians3
- Revolutionaries3