Interpretation of geophysical logs, aquifer tests, and water levels in wells in and near the North Penn Area 7 Superfund Site, upper Gwynedd Township, Montgomery County, Pennsylvania, 2000-02 [electronic resource] / by Lisa A. Senior ... [et al.] ; in cooperation with the U.S. Environmental Protection Agency.
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2005.