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2012 [1]
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Potentiometric surface and water-level difference maps of selected confined aquifers of Southern Maryland and Maryland's Eastern Shore, 1975-2011 [研究报告]
U.S. Geological Survey. 2012-01-01
Curtin, Stephen E. securtin@usgs.gov;  Andreasen, David C.;  Staley, Andrew W.
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