Subject
Land use, Rural
Mines and mineral resources
Montana
61
Wyoming
50
New Mexico
46
Colorado
44
Washington (State)
25
Oregon
18
South Dakota
6
North Dakota
5
Government publications
4
Idaho
3
British Columbia
2
Yellowstone National Park
2
Agriculture
1
Arizona
1
California
1
Environmental protection
1
Ethnic groups
1
Ethnology
1
Grand Mesa National Forest (Colo.)
1
Harney County (Or.)
1
Natural resources
1
Nevada
1
Soil conservation
1
Somalia
1
Somalia Population
1
Steens Mountain (Or.)
1
Texas
1
Uncompahgre National Forest (Colo.)
1
Utah
1
Water resources development
1
Wilderness areas
1