Region
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South America
1
South Asia
3
South China Sea
1
Southeast Asia
4
Southwest, New
1
Soviet Union
6
Spain
2
Sun
1
Tanzania
2
Tennessee
2
Tennessee River Valley
1
Texas
1
Ukraine
1
United States
905
Utah
1
Washington (State)
1
West (U.S.)
4
West Virginia
2
Westlands Water District (Calif.)
1
Wyoming
1