TY - RPRT TI - Altitude and configuration of the regional potentiometric surface, Willow Grove Naval Air Station/Joint Reserve Base and vicinity, Horsham Township, Montgomery County, Pennsylvania, October 7-8, 1999 AU - Ronald A. Sloto AU - D.J. Goode AU - John H. Way PY - 2001 DO - 10.3133/ofr01149 UR - https://pubs.usgs.gov/publication/ofr01149 ID - ofr01149 ER -