Potentiometric surface of the upper Patapsco Aquifer in southern Maryland [microform] / U.S. Department of the Interior, U.S. Geological Survey ; prepared in cooperation with Maryland Geological Survey and Maryland Tidewater Administration.
Potentiometric surface of the upper Patapsco Aquifer in southern Maryland [microform] / U.S. Department of the Interior, U.S. Geological Survey ; prepared in cooperation with Maryland Geological Survey and Maryland Tidewater Administration.