TY - RPRT TI - Water resources data fro Pennsylvania; Volume 1, Delaware River basin, water year 1976 AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1977 DO - 10.3133/wdrpa761 UR - https://pubs.usgs.gov/publication/wdrPA761 ID - wdrPA761 ER -