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Geographic Term
- United States129
- Soviet Union49
- Soviet Union History 1925-1953. nli11
- China9
- Soviet Union Foreign relations United States6
- Soviet Union History Revolution, 1917-19216
- United States Foreign relations Soviet Union6
- United States Politics and government 1933-19456
- Germany (East)5
- Soviet Union Politics and government 1917-19365
- Spain5
- Germany4
- Soviet Union Economic conditions 1917-19454
- Korea (North)3
- Latin America3
- Middle East Palestine3
- New York (State) New York3
- Russia (Federation) Moscow3
- Soviet Union Social conditions3
- United States Economic conditions 1918-19453