Geography
United States
998 results
Argentina
8 results
Middle West
7 results
Canada
5 results
Cuba
5 results
Mexico
5 results
Southern States
5 results
Washington (D.C.)
4 results
Alaska
3 results
California
3 results
Florida
3 results
Louisiana
3 results
Mississippi River Valley
3 results
Puerto Rico
3 results
Alabama
2 results
Developing countries
2 results
European Economic Community countries
2 results
Hawaii
2 results
Idaho
2 results
Illinois
2 results
India
2 results
Iraq
2 results
Michigan
2 results
Mississippi
2 results
Mississippi River
2 results
Montana
2 results
New England
2 results
North Dakota
2 results
Northwest, Pacific
2 results
Oklahoma
2 results
Oregon
2 results
Pennsylvania
2 results
Russia (Federation)
2 results
South Carolina
2 results
Southwestern States
2 results
Soviet Union
2 results
Virginia
2 results
Africa
1 results
America
1 results
Arctic regions
1 results
Arkansas
1 results
Asia
1 results
Australia
1 results
Brazil
1 results
Caseyville
1 results
Cass Lake Dam (Minn.)
1 results
Central America
1 results
Chicago
1 results
Chile
1 results
China
1 results
more…