by Tony P. Schrader
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Potentiometric surfaces of aquifers in t...
Status of water levels in aquifers in th...
Status of water levels and selected wate...
Potentiometric surface of the Ozark aqui...
Nuclear waste
Hazardous waste
Snow Falling on Cedars
Pesticides
Status of ground-water resources at U.S....
Hydrologic data, 1964