Geography
Soviet Union
4 results
Russia
2 results
Russia (Federation)
2 results
Aldan Plateau
1 results
Anabar Shield
1 results
Azerbaijan
1 results
Baltic States
1 results
Cheli︠a︡binskai︠a︡ oblastʹ
1 results
Donets Basin
1 results
Donets Basin (Ukraine and R.S.F.S.R.)
1 results
Moldova
1 results
Prut River Valley
1 results
Russia, Northern
1 results
Siberia, Eastern
1 results
Volga River Valley
1 results