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Groundwater quality and simulation of sources of water to wells in the Marsh Creek valley at the U.S. Geological Survey Northern Appalachian Research Laboratory, Tioga County, Pennsylvania [研究报告]
U.S. Geological Survey. 2012-01-01
Risser, Dennis W. dwrisser@usgs.gov;  Breen, Kevin J. kjbreen@usgs.gov
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