TY - RPRT TI - Altitude and configuration of the potentiometric surface in the Lower White Clay Creek and Upper Christina River Basins including portions of Franklin, London Britain, New Garden, and New London Townships, Chester County, Pennsylvania, June through September 2005 AU - Lindsay B. Hale PY - 2006 DO - 10.3133/sim2939 UR - https://pubs.usgs.gov/publication/sim2939 ID - sim2939 ER -