Geographic Subject
United States
10
Soviet Union
9
Russia (Federation)
8
China
6
Germany
4
Poland
4
India
3
Japan
3
Great Britain
2
Indonesia
2
Russian Far East
2
Afghanistan
1
Asia, Southeastern
1
Developing countries
1
Europe
1
Greece
1
Italy
1
Karelia
1
Kenya
1
Korea
1
Minnesota
1
Moldova
1
Mongolia
1
Morocco
1
Rome
1
Sakha
1
Sakhalinska︠i︡a oblast'
1
Sakhalinska︠i︡a oblastʹ
1
Siberia
1
Sri Lanka
1
Sweden
1
Thailand
1
Yakutia
1
Zambia
1