TY - RPRT TI - Surface geophysics and porewater evaluation at the Lower Darby Creek Area Superfund Site, Philadelphia, Pennsylvania, 2013 AU - Charles W. Walker AU - James R. Degnan AU - Michael J. Brayton AU - Roberto M. Cruz AU - Michelle M. Lorah PY - 2015 DO - 10.3133/ds927 UR - https://pubs.usgs.gov/publication/ds927 ID - ds927 ER -