Geography
United States
982 results
Cuba
7 results
Washington (D.C.)
7 results
Guantánamo Bay Naval Base
5 results
New York (State)
5 results
Soviet Union
5 results
Utah
5 results
Pennsylvania
4 results
Arkansas
3 results
California
3 results
Canal Zone
3 results
Delaware
3 results
Foreign countries
3 results
Iowa
3 results
Kentucky
3 results
Michigan
3 results
New England
3 results
New York (N.Y.)
3 results
Panama Canal (Panama)
3 results
Virginia
3 results
États-Unis
3 results
Alaska
2 results
Chile
2 results
China
2 results
Colorado
2 results
Florida
2 results
Great Lakes Watershed (North America)
2 results
Hawaii
2 results
Mexican-American Border Region
2 results
North Carolina
2 results
Northeastern States
2 results
Oklahoma
2 results
Saint Lawrence River Watershed
2 results
Shelby County (Ala.)
2 results
Singapore
2 results
Akron (Ohio)
1 results
Arizona
1 results
Arlington (Va.)
1 results
Baltimore (Md.)
1 results
Bay City (Mich.)
1 results
Boston (Mass.)
1 results
Boulder
1 results
Bridgeport (Conn.)
1 results
Canada
1 results
Chicago (Ill.)
1 results
Columbia River
1 results
Connecticut River Watershed
1 results
Decatur (Ala.)
1 results
Dothan (Ala.)
1 results
Great Britain
1 results
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