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Dunkle, S.A., Plummer, L.N., Busenberg, E., Phillips, P.J., Denver, J.M., Hamilton, P.A., Michel, R.L., and Coplen, T.B., 1993, Chlorofluoro-carbons (CC13F and CC12F2) as dating tools and hydrologic tracers in shallow groundwater of the Delmarva Peninsula, Atlantic Coastal Plain, United States: Water Resources Research, vol. 29, no. 12, p. 3837-3860.  Available Online

Alvarez, D.A., Cranor, W.L., Perkins, S.D., Clark, R.C., and Smith, S.B., 2008, Chemical and toxicologic assessment of organic contaminants in surface water using passive samplers: Journal of Environmental Quality 2008 (37), p. 1024-1033.  doi: 10.2134/jeq2006.0463 Available Online

Hopkins, Evelyn H., and Hippe, Daniel J., 1999, Can land-use patterns serve as a predictor of pesticide occurrence within an urban landscape?: in Hatcher, K.J., ed., U.S. Geological Survey reprints from proceedings of the 1999 Georgia Water Resources Conference, March 30-31, 1999 The University of Georgia, Athens, Georgia, p. 180-185. 

Bales, J.D., and Nardi, M.R., 2007, Automated routines for calculating whole-stream metabolism-Theoretical background and user's guide: U.S. Geological Survey Techniques and Methods 4-C2, 33 p.  Available Online

Frey, J.W., Baker, N.T., Lydy, M.J., and Stone, W.W., 1996, Assessment of water quality at selected sites in the White River Basin, Indiana, 1993 and 1995 using biological indices: U.S. Geological Survey Fact Sheet FS-209-96, 4 p.  Available Online

Stewart, Jana S., 1994, Assessment of alternative methods for stratifying landsat TM data to improve land cover classification accuracy across areas with physiographic variation: University of Wisconsin-Madison, Master of Science thesis, 159 p. 

Eberts, Sandra M., Erwin, Martha L., and Hamilton, Pixie A., 2005, Assessing the vulnerability of public-supply wells to contamination from urban, agricultural, and natural sources: U.S. Geological Survey Fact Sheet 2005-3022, 4 p.  Available Online

Meador, Michael R., McIntyre, Julie P., and Pollock, Kenneth H., 2003, Assessing the efficacy of single-pass backpack electrofishing to characterize fish community structure: Transactions of the American Fisheries Society, vol. 132, p. 39-46.  doi: 10.1577/1548-8659(2003)132<0039:ATEOSP>2.0.CO;2 Available Online

Moran, M.J., Zogorski, J.S., and Rowe, B.L., 2006, Approach to an assessment of volatile organic compounds in the Nation's ground water and drinking-water supply wells: U.S. Geological Survey Open-File Report 2005-1452, 36 p.  Available Online

Zelt, R.B., 1991, Applications of GIS to the management and analysis of hydrologic information: GIS World, vol. 4, no. 5, August 1991. 

Toccalino, Patricia L., Norman, Julia E., Phillips, Robyn H., Kauffman, Leon J., Stackelberg, Paul E., Nowell, Lisa H., Krietzman, Sandra J., and Post, Gloria B., 2004, Application of health-based screening levels to ground-water quality data in a state-scale pilot effort: U.S. Geological Survey Scientific Investigations Report 2004-5174, 64 p.  Available Online

Elder, J.F., 1989, Applicability of ambient toxicity testing to national or regional water-quality assessment: U.S. Geological Survey Open-File Report 89-55 and Circular 1049, 102 p.  Available Online

Elder, J.F., 1989, Applicability of ambient toxicity testing to national or regional water-quality assessment: U.S. Geological Survey Open-File Report 89-55 and Circular 1049, 102 p.  Available Online

Foreman, W.T., Zaugg, S.D., Faires, L.M., Wener, M.G., Lilker, T.J., and Rogerson, P.F., 1992, Analytical interferences of mercuric chloride preservative in environmental water samples: Determination of organic compounds isolated by continuous liquid--Liquid extraction or closed-loop stripping: Environmental Science Technology, vol. 26, no. 7, p. 1307-1312.  doi: 10.1021/es00031a004 Available Online

Steffeck, D.W., and Striegl, R.G., 1989, An inventory and evaluation of biological investigations that relate to stream-water-quality in the Upper Illinois River Basin of Illinois, Indiana, and Wisconsin: U.S. Geological Survey Water-Resources Investigations Report 89-4041, 54 p.  Available Online

Daniels, Robert A., Riva-Murray, Karen, Halliwell, David B., Vana-Miller, David, L., Bilger, Michael D., 2002, An index of biological integrity for northern Mid-Atlantic Slope drainages: Transactions of the American Fisheries Society, vol. 131, no. 6, p. 1044-1060.  doi: 10.1577/1548-8659(2002)131<1044:AIOBIF>2.0.CO;2 Available Online

Jurgens, Bryant C., McMahon, Peter B., Chapelle, Francis H., and Eberts, Sandra M., 2009, An Excel® workbook for identifying redox processes in ground water: U.S. Geological Survey Open-File Report 2009-1004, 8 p.  Available Online

Kent, Robert, Belitz, Kenneth, and Burton, Carmen A., 2005, Algal Productivity and Nitrate Assimilation in an Effluent Dominated Concrete Lined Stream: Journal of the American Water Resources Assocation, vol.41, no. 5, October 2005, p. 1109-1128.  Available Online

Porter, Stephen D., 2008, Algal Attributes: An Autecological Classification of Algal Taxa Collected by the National Water-Quality Assessment Program: U.S. Geological Survey Data Series 329, 18 p.  Available Online

Maupin, Molly A., 1997, Agricultural land-use classification using Landsat imagery data, and estimates of irrigation water use in Gooding, Jerome, Lincoln, and Minidoka Counties, 1992 water year, Upper Snake River Basin, Idaho and western Wyoming: U.S. Geological Survey Water-Resources Investigations Report 97-4115, 29 p.  Available Online

Martin, J.D., Stone, W.W., Wydoski, D.S., and Sandstrom, M.W., 2009, Adjustment of pesticide concentrations for temporal changes in analytical recovery, 1992-2006: U.S. Geological Survey Scientific Investigations Report 2009-5189, 24 p.  Available Online

McCarthy, K.A., and Capel, P.D., 2009, A whole-system approach to understanding agricultural chemicals in the environment: U.S. Geological Survey Fact Sheet 2009-3042, 6 p., on-line only.  Available Online

Ator, S.W., Denver, J.M., Krantz, D.E., Newell, W.L., and Martucci, S.K., 2005, A surficial hydrogeologic framework for the Mid-Atlantic coastal plain: U.S. Geological Survey Professional Paper 1680, 44 p., and 4 maps.  Available Online

Scott, J.C., 1990, A statistical processor for analyzing simulations made using the modular finite-difference ground-water flow model: U.S. Geological Survey Water-Resources Investigations Report 89-4159, 218 p.  Available Online

Mahler, B.J., and Van Metre, P.C., , 2003, A simplified approach for monitoring hydrophobic organic contaminants associated with suspended sediment - methodology and applications: Archives of Environmental Contamination and Toxicology, vol. 44, no. 3, p. 288-297.  doi: 10.1007/s00244-002-2032-3 Available Online

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