Geography
United States
157 results
North America
16 results
Soviet Union
11 results
Florida
10 results
Great Britain
10 results
South America
9 results
Texas
9 results
Canada
8 results
Central America
7 results
France
7 results
Mexico
7 results
Atlantic Ocean
6 results
California
6 results
Canal Zone
6 results
Germany
6 results
Pacific Ocean
6 results
Tropics
6 results
Antarctica
5 results
Arkansas
5 results
Brazil
5 results
Austria
4 results
England
4 results
Japan
4 results
Maryland
4 results
Polar Regions
4 results
Arctic regions
3 results
Arizona
3 results
Australia
3 results
Egypt
3 results
Illinois
3 results
Latin America
3 results
Mexico, Gulf of
3 results
North Pacific Ocean
3 results
Trinidad
3 results
Utah
3 results
Venezuela
3 results
États-Unis
3 results
Africa
2 results
Alaska
2 results
Calvert Cliffs
2 results
Caribbean Area
2 results
China
2 results
College Station
2 results
Costa Rica
2 results
Cuba
2 results
Czechoslovakia
2 results
Developing countries
2 results
Europe
2 results
Foreign countries
2 results
Greenland
2 results
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