Geographic Subject
Soviet Union
149
Russia (Federation)
69
Siberia
14
Earth
8
Russian Far East
6
Siberia, Western
5
United States
5
Barents Sea
3
Estonia
3
Russia
3
Ural Mountains Region
3
Asia, Central
2
Azerbaijan
2
Baikal, Lake
2
Baltic Shield
2
Developing countries
2
Europe, Eastern
2
Former Soviet republics
2
Khanka Lake, Russia and China
2
Moscow
2
Russian Far East (Russia)
2
Ural Mountains Region (Russia)
2
Vietnam
2
Amurska︠i︡a oblastʹ
1
Aral Sea (Uzbekistan and Kazakhstan)
1
Arctic Regions
1
Arctic regions
1
Atlantic Ocean
1
Baikal, Lake, Region (Russia)
1
Bashkortostan (Russia)
1
Biophysics
1
Black Sea
1
Byzantine Empire
1
Caspian Sea Region
1
Communist countries
1
Czechoslovakia
1
Dagestan (Russia)
1
Hungary
1
Iran
1
Karelia (Russia)
1
Kazakhstan
1
Khabarovskiĭ kraĭ
1
Kola Peninsula
1
Kola Peninsula (Russia)
1
Komi
1
Krasno︠i︡arskiĭ kraĭ
1
Krasno︠i︡arskiĭ kraĭ (Russia)
1
Kutil Islands
1
Kuznetsk Basin
1
Ladoga Lake
1
more ...