U.S. Geological Survey
National Water-Quality Assessment Program

USGS Internal Access Only

Bibliography

Fenneman, N.M., 1938, Physiography of eastern United States: New York, McGraw-Hill, 714 p.

Focazio, M.J., Reilly, T.E., Rupert, M.G., and Helsel, D.R., 2002, Assessing ground-water vulnerability to contamination: Providing scientifically defensible information for decision makers: U.S. Geological Survey Circular 1224, 33 p.

Hunt, C.B., 1967, Physiography of the United States: San Francisco, W.H. Freeman and Company, 480 p.

Lindsey, B.D., Falls, W.F., Ferrari, M.J., Zimmerman, T.M., Harned, D.A., Sadorf, E.M., and Chapman, M.J., 2006, Factors affecting occurrence and distribution of selected contaminants in ground water from selected areas in the Piedmont Aquifer System, Eastern United States, 1993-2003, U.S. Geological Survey Scientific Investigations Report 2006-5104, 40 p.

Lindsey, B.D., Loper, C.A., and Hainly, R.A., 1997, Nitrate in ground water and stream base blow in the Lower Susquehanna River Basin, Pennsylvania and Maryland: U.S. Geological Survey Water-Resources Investigations Report 97-4146, 66 p.

Pesticide National Synthesis Project, 1997, National summary of detections in ground water, accessed on 12/09/02, at URL <http://wwwdcascr.wr.usgs.gov/pnsp/detectgw.html>

Risser D.W., and Siwiec, S.F., 1996, Water-quality assessment of the Lower Susquehanna  River Basin, Pennsylvania and Maryland: Environmental setting: U.S. Geological Survey Water-Resources Investigations Report 94-4245, 70 p.

Trapp, Henry Jr., and Horn, M.A., 1997,  Ground water atlas of the United States: Delaware, Maryland, New Jersey, North Carolina, Pennsylvania, Virginia, West Virginia, U.S. Geological Survey Hydrogeologic Investigations Atlas 730-L, 24 p.

U.S. Department of Commerce, 1990, 1987 Census of Agriculture  - Part 38, Pennsylvania state and county data: U.S. Department of Commerce, Bureau of the Census, v. 1, Geographic Area Series

Zimmerman, T.M., and Lindsey, B.D., 2006, Ground-Water Quality in the Piedmont Aquifers, Eastern United States – A Summary of Studies by the U.S. Geological Survey National Water-Quality Assessment Program, 1993-2003 [abs]: The Geological Society of America Northeastern Section - 41st Annual Meeting Geological Society of America, Abstracts with Programs v. 38, no. 2, p.34.