Geography
United States
395 results
Europe
42 results
Russia (Federation)
26 results
Texas
26 results
Former Soviet republics
19 results
Wyoming
19 results
Canada
15 results
Middle East
13 results
Asia, Central
11 results
Great Britain
11 results
Iran
11 results
Soviet Union
11 results
Alaska
10 results
Mexico
9 results
Mexico, Gulf of
9 results
China
8 results
England
8 results
Denver Basin
7 results
New Mexico
7 results
North America
7 results
Sublette County
7 results
Caspian Sea Region
6 results
Developing countries
6 results
North Dakota
6 results
Carbon County
5 results
European Union countries
5 results
India
5 results
Pennsylvania
5 results
West Virginia
5 results
Africa
4 results
Arctic regions
4 results
California
4 results
Europe, Eastern
4 results
Gulf States
4 results
Kazakhstan
4 results
Saskatchewan
4 results
Africa, North
3 results
Alberta
3 results
Appalachian Region
3 results
Asia
3 results
Colorado
3 results
France
3 results
Hawaii
3 results
Ireland
3 results
Montana
3 results
National Petroleum Reserve
3 results
National Petroleum Reserve (Alaska)
3 results
Nigeria
3 results
OECD countries
3 results
Ohio
3 results
more…