TY - RPRT TI - Altitude and configuration of the potentiometric surface in Plumstead Township, Bucks County, Pennsylvania, June 1991 through November 1991 AU - Curtis L. Schreffler PY - 1993 DO - 10.3133/ofr9327 UR - https://pubs.usgs.gov/publication/ofr9327 ID - ofr9327 ER -