1981. 2023-02-10T22:34:18Z. 2023-02-14T23:01:58Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Maryland and Maryland.
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1981. 2002-06-01T04:00:00Z. 2023-02-11T04:04:30Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Maryland.
3. Map showing the potentiometric surface of the Aquia aquifer, May 19-23, 1980 [cartographic material]
1981. 2002-06-01T04:00:00Z. 2023-01-13T04:04:30Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Maryland.
1981. 2002-06-01T04:00:00Z. 2023-02-11T04:04:30Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Maryland.
