1. Radium and radon in ground water in the Chickies Quartzite, southeastern Pennsylvania Author/Creator: Senior, Lisa A., author Publication/Creation: Lemoyne, Pennsylvania : U.S. Department of the Interior, U.S. Geological Survey, 1995 Resource Type: Book Access & Availability: Loading
2. Reconnaissance of mine drainage in the coal fields of eastern Pennsylvania Author/Creator: Growitz, Douglas J., author Publication/Creation: Harrisburg, Pennsylvania : U.S. Geological Survey, 1985 Resource Type: Book Access & Availability: Loading
3. Regional curve development and selection of a reference reach in the non-urban, lowland sections of the Piedmont Physiographic Province, Pennsylvania and Maryland Author/Creator: White, Kirk E. Publication/Creation: New Cumberland, Pa. : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading
4. Relation between selected well-construction characteristics and occurrence of bacteria in private household-supply wells, south-central and southeastern Pennsylvania Author/Creator: Zimmerman, Tammy M. Publication/Creation: New Cumberland, Pa. : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading
5. Relation between selected well-construction characteristics and occurrence of bacteria in private household-supply wells, south-central and southeastern Pennsylvania Author/Creator: Zimmerman, Tammy M. Publication/Creation: New Cumberland, Pa. : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading
6. Relations of biological indicators to nutrient data for lakes and streams in Pennsylvania and West Virginia, 1990-98 Author/Creator: Brightbill, Robin A. Publication/Creation: New Cumberland, Pa. : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading