1. Relation of ground-water quality to land use in the Philadelphia, Pennsylvania--Camden, New Jersey area Author/Creator: Blickwedel, Roy S., author Publication/Creation: Harrisburg, Pennsylvania : U.S. Geological Survey, 1989 Resource Type: Book Access & Availability: Loading
2. Hydrogeology and ground-water quality at a land reclamation site, Neshaminy State Park, Pennsylvania Author/Creator: Blickwedel, Roy S., author Publication/Creation: Harrisburg, Pennsylvania : U.S. Geological Survey, 1987 Resource Type: Book Access & Availability: Loading