1. Geohydrology and ground-water quality, Big Elk Creek Basin, Chester County, Pennsylvania, and Cecil County, Maryland Author/Creator: Sloto, Ronald A. Publication/Creation: Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor] Resource Type: Book Access & Availability: Loading
2. Geohydrology of southeastern Pennsylvania Author/Creator: Low, Dennis J. (Dennis James) Publication/Creation: New Cumberland, Pa. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
3. Geologic framework of the regional ground-water flow system in the Upper Deschutes Basin, Oregon Author/Creator: Lite, Kenneth E. Publication/Creation: Portland, Or. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading