Geography
Europe
North Sea
9 results
Russia (Federation)
9 results
United States
8 results
Former Soviet republics
6 results
North America
6 results
Russia
5 results
Asia, Central
4 results
Azerbaijan
3 results
Baku
3 results
Asia
2 results
Caspian Sea
2 results
Caspian Sea Region
2 results
Europe, Northern
2 results
Great Britain
2 results
North Sea Region
2 results
Norway
2 results
Pannonia Region
2 results
Saudi Arabia
2 results
Africa
1 results
Africa, North
1 results
Bekes Basin
1 results
Bekes Basin (Hungary and Romania)
1 results
Bremen (Germany)
1 results
Developing countries
1 results
Donets Basin
1 results
Donets Basin (Ukraine and Russia)
1 results
East Asia
1 results
Europe, Eastern
1 results
Germany
1 results
Irish Sea
1 results
Japan
1 results
Middle East
1 results
Nordsee
1 results
North Atlantic Ocean
1 results
Persian Gulf Region
1 results
Soviet Union
1 results