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2. Water-quality assessment of the Lower Susquehanna River Basin, Pennsylvania and Maryland : environmental setting
3. Water quality of large discharges from mines in the anthracite region of eastern Pennsylvania
4. Temporal changes in sulfate, chloride, and sodium concentrations in four eastern Pennsylvania streams
5. Techniques for estimating magnitude and frequency of peak flows for Pennsylvania streams
6. Suspended-sediment yields from an unmined area and from mined areas before and after reclamation in Pennsylvania, June 1978-September 1983
7. Surface-water quality changes after 5 years of nutrient management in the Little Conestoga Creek headwaters, Pennsylvania, 1989-91
8. Summary of and factors affecting pesticide concentrations in streams and shallow wells of the lower Susquehanna River basin, Pennsylvania and Maryland, 1993-95
9. A strategy for delineating the area of ground-water contribution to wells completed in fractured bedrock aquifers in Pennsylvania
10. Simulation of streamflow and water quality in the Christina River subbasin and overview of simulations in other subbasins of the Christina River basin, Pennsylvania, Maryland, and Delaware, 1994-98
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