Altitude and configuration of the potentiometric surface in Buckingham and Wrightstown Townships, Bucks County, Pennsylvania, June 1992 through January 1993
by B. Craig McManus, Curtis L. Schreffler, and Cynthia J. Rowland-Lesitsky ; U.S. Department of the Interior, U.S. Geological Survey ; prepared in cooperation with New Hope Borough ... [and others]