Subject
United States
41
Computer files
22
United States Population
13
Mines and mineral resources
11
Geology
9
Census districts
8
Election districts
8
Land grants
8
Land titles Registration and transfer
8
Streets
7
Zip codes
7
Demographic surveys
6
Geochemistry
6
Housing
6
Seismic prospecting
6
Health surveys
5
Natural gas reserves
5
Petroleum reserves
5
Industrial statistics
4
Menominee County (Wis.) Population
4
Menominee Indian Reservation (Wis.) Population
4
National Petroleum Reserve (Alaska)
4
Sacramento Metropolitan Area (Calif.) Population
4
South Carolina Population
4
United States Economic conditions
4
Air Pollution
3
College attendance Longitudinal studies
3
Educational surveys
3
Environmental impact analysis
3
Environmental protection
3
Geophysics
3
Hazardous waste site remediation Technological innovations
3
Hazardous waste sites
3
Income
3
Industrial minerals
3
Oil wells
3
Older people Health and hygiene
3
Older people Medical care
3
Pollution
3
Postsecondary education Longitudinal studies
3
Stream measurements
3
Transportation
3
African Americans Population
2
Aging
2
Agriculture
2
Agriculture States
2
Atmospheric temperature
2
Coal Geology
2
Coal reserves
2
Community development
2
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