Geography
United States
1,615 results
Texas
67 results
California
49 results
Developing countries
49 results
Europe
42 results
China
36 results
Soviet Union
36 results
Canada
34 results
Northwest, Pacific
29 results
Great Britain
24 results
India
21 results
Alaska
20 results
Asia
18 results
Mexico
17 results
Australia
16 results
Middle East
16 results
Brazil
15 results
Colorado
13 results
Latin America
13 results
New Mexico
13 results
Pacific Area
13 results
North America
12 results
Africa
11 results
European Union countries
11 results
West (U.S.)
11 results
OECD countries
10 results
Russia (Federation)
9 results
États-Unis
9 results
Hawaii
8 results
Iran
8 results
Japan
8 results
Utah
8 results
Former Soviet republics
7 results
Korea (North)
7 results
Washington (State)
7 results
Africa, Sub-Saharan
6 results
Caribbean Area
6 results
Europe, Eastern
6 results
European Economic Community countries
6 results
Pennsylvania
6 results
Saskatchewan
6 results
Algeria
5 results
Arizona
5 results
Caspian Sea Region
5 results
East Asia
5 results
France
5 results
Kentucky
5 results
Libya
5 results
Mexico, Gulf of
5 results
New Zealand
5 results
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