Subject
Geology
17
Groundwater
10
Hydrogeology
10
Plants
8
Public lands Management
8
Vertebrates
8
Water quality
6
Buenos Aires National Wildlife Refuge (Ariz.)
5
Land titles Registration and transfer
5
Reservoirs Law and legislation
5
River sediments
5
Veterans Medical care Evaluation
5
Veterans' hospitals Evaluation
5
Wildlife refuges
5
Air quality management
4
C.C. Cragin Dam (Ariz.)
4
C.C. Cragin Reservoir (Ariz.)
4
Dams Law and legislation
4
Environmental impact analysis
4
Geology, Structural
4
National parks and reserves Management
4
Precipitation (Meteorology)
4
Sediment transport
4
Stream measurements
4
Water withdrawals
4
Air Pollution Measurement
3
Aquifers
3
Architecture
3
Chiricahua National Monument (Ariz.)
3
Coal-fired power plants Environmental aspects
3
Dams Environmental aspects
3
Endangered species
3
Environmental impact statements
3
Forest management
3
Groundwater recharge
3
Historic buildings
3
Historic sites
3
Hydrology
3
Kaibab National Forest (Ariz.)
3
Mines and mineral resources
3
Natural resources Management
3
Rivers Regulation Environmental aspects
3
Sedimentation and deposition
3
Uranium mines and mining Environmental aspects
3
Water chemistry
3
Water levels
3
Water quality Government policy
3
Water rights
3
Water-supply
3
Wildfires Environmental aspects
3
more ...