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Geographic Term
- United States803
- Soviet Union149
- Great Britain147
- Germany110
- China109
- Germany (East)44
- New York (State)36
- United States Politics and government 1933-194531
- New York (State) New York23
- Cyprus22
- Europe21
- Soviet Union Politics and government 1917-193618
- Germany (West)16
- France15
- Spain15
- Poland14
- Soviet Union History Revolution, 1917-192114
- Soviet Union History 1925-1953. nli13
- Turkey13
- United States Economic conditions 1918-194513