National Water-Quality Assessment (NAWQA) Program
Phillips, P.J., Ator, S.W., and Nystrom, E.A., 2007, Temporal Changes in Surface-Water Insecticide Concentrations after the Phaseout of Diazinon and Chlorpyrifos: Environmental Science and Technology, v. 41(12), p. 4246–4251.
McMahon, Gerard, Tervelt, Larinda, and Donehoo, William, 2007, Methods for estimating annual wastewater nutrient loads in the southeastern United States: U.S. Geological Survey Open-File Report 2007–1040, 81 p..
Anning, David W., Bauch, Nancy J., Gerner, Steven J., Flynn, Marilyn E., Hamlin, Scott N., Moore, Stephanie J., Schaefer, Donald H., Anderholm, Scott K., and Spangler, Lawrence E., 2007, Dissolved solids in basin-fill aquifers and streams in the southwestern United States: U.S. Geological Survey Scientific Investigations Report 2006-5315 [http://pubs.usgs.gov/sir/2006/5315/]