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Subject
- Edwards Aquifer (Tex.)6
- Regression analysis6
- Floridan Aquifer5
- Groundwater -- Pollution -- United States4
- Natural gas -- Hydrates4
- Aquifers -- Arkansas3
- Atmospheric deposition -- United States3
- Floods -- Skagit River (B.C. and Wash.)3
- Groundwater -- Arkansas -- Quality3
- Groundwater -- Nevada3
- Groundwater -- Pollution -- Nebraska3
- Groundwater -- Pollution -- New Jersey3
- Groundwater -- United States3
- High Plains Aquifer3
- Hydrogeology -- Floridan Aquifer3
- Hydrogeology -- Georgia -- Atlantic Coast3
- Hydrogeology -- Washington (State) -- Yakima River Watershed3
- Mercury -- Environmental aspects -- Indiana3
- Stream measurements -- Skagit River (B.C. and Wash.)3
- Air -- Pollution -- Indiana2