Geographic Subject
Russia (Federation)
9
Soviet Union
6
Russian Far East
4
India
3
Indonesia
3
Asia
2
Kuznetsk Basin
2
Kuznetsk Basin (Russia)
2
Russian Far East (Russia)
2
Siberia
2
Arctic regions
1
Bangladesh
1
Developing countries
1
Kalimantan Timur
1
Kalimantan Timur (Indonesia)
1
Kazakhstan
1
Malaysia
1
North America
1
Southeast Asia
1