Region
United States
195
Colorado
25
New Mexico
9
Alaska
7
West (U.S.)
7
India
6
Wyoming
6
European Union countries
5
Northwest, Pacific
5
Pacific Area
5
California
4
China
4
Developing countries
4
Utah
4
Europe
3
Great Britain
3
Afghanistan
2
Africa
2
Africa, Sub-Saharan
2
Australia
2
Canada
2
Colorado River Watershed (Colo.-Mexico)
2
Front Range (Colo. and Wyo.)
2
Hawaii
2
Iran
2
Mexico
2
North America
2
Ogallala Aquifer
2
Pakistan
2
Russia
2
Russia (Federation)
2
South Africa
2
Texas
2
Afognak quadrangle
1
Africa, East
1
American Samoa
1
Arctic regions
1
Asia
1
Asia, Central
1
Bangladesh
1
Carbon County
1
Custer National Forest (Mont. and S.D.)
1
Denver Basin
1
Earth
1
Earth (Planet)
1
East Asia
1
Emery County
1
Europe, Eastern
1
Former Soviet republics
1
Great Britian
1
more ...