Geographic Subject
Soviet Union
49
Russia (Federation)
33
United States
10
Siberia
9
Poland
5
Siberia (Russia)
5
China
3
India
3
Russian Far East
3
Ural Mountains Region
3
Yugoslavia
3
Alabama
2
Baltic States
2
Belarus
2
Confederate States of America
2
Former Soviet republics
2
Louisiana
2
Moldova
2
Ohio
2
Pennsylvania
2
Russia
2
Russia, Northern
2
Russian Far East (Russia)
2
Siberia, Eastern
2
Siberia, Eastern (Russia)
2
Thailand
2
Arctic regions
1
Asia, Central
1
Asia, Southeastern
1
Bangladesh
1
Belgium
1
Boston
1
Canada
1
Chicago (Ill.)
1
Dhaka
1
England
1
Europe
1
Germany
1
Germany (West)
1
Great Britain
1
Indonesia
1
Iowa
1
Kama River Region
1
Karelia
1
Kuznetsk Basin
1
Kyrgyzstan
1
Latin America
1
Massachusetts
1
Michigan
1
Middle East
1
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