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Subject Geographical Term
Poland
1,921
Czechoslovakia
1,563
USA
1,243
Romania
1,013
Germany
972
USSR
954
Hungary
947
Bulgaria
742
China
364
Yugoslavia
350
German Democratic Republic
252
Soviet Union
202
Vietnam
188
Cuba
163
Albania
127
France
111
Eastern Europe
97
Israel
92
Austria
84
Vatican City
79