31. Pesticides in surface water of the Yakima River basin, Washington, 1999-2000 : their occurrence and an assessment of factors affecting concentrations and loads Author/Creator: Ebbert, J. C. Publication/Creation: Portland, Or. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
32. Pesticides in the lower Clackamas River basin, Oregon, 2000-01 Author/Creator: Carpenter, Kurt D. Publication/Creation: Denver, CO : U.S. Geological Survey, Information Services [distributor]. Resource Type: Book Access & Availability: Loading
33. PH measurement of low-conductivity waters Author/Creator: Busenberg, Eurybiades, author Publication/Creation: Reston, Virgnia : U.S. Geological Survey, 1987 Resource Type: Book Access & Availability: Loading
34. Phase I summary and phase II plan for comparing regulated with unregulated streamflow in the Yakima River at Union Gap, Washington Author/Creator: Swift, Charles H., author Publication/Creation: Tacoma, Washington : United States Department of the Interior, Geological Survey, 1985 Resource Type: Book Access & Availability: Loading
35. Phenolic contamination in the sand-and-gravel aquifer from a surface impoundment of wood treatment wastes, Pensacola, Florida Author/Creator: Troutman, David E., author Publication/Creation: Tallahassee, Florida : U.S. Geological Survey, 1984 Resource Type: Book Access & Availability: Loading
36. Phosphorus and E. coli and their relation to selected constituents during storm runoff conditions in Fanno Creek, Oregon, 1998-99 Author/Creator: Anderson, Chauncey W. Publication/Creation: Portland, Or. : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
37. Phosphorus and E. coli in the Fanno and Bronson Creek subbasins of the Tualatin River basin, Oregon, during summer low-flow conditions, 1996 Author/Creator: McCarthy, Kathleen A., author Publication/Creation: Portland, Oregon : U.S. Geological Survey, 2000 Resource Type: Book Access & Availability: Loading
38. Phosphorus and nitrogen concentrations and loads at Illinois River south of Siloam Springs, Arkansas, 1997-1999 Author/Creator: Green, W. Reed Publication/Creation: Little Rock, Ark. : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading
39. Phosphorus and nitrogen concentrations and loads at Illinois River south of Siloam Springs, Arkansas, 1997-1999 Author/Creator: Green, W. Reed Publication/Creation: Little Rock, Ark. : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading
40. Phosphorus concentrations, loads, and yields in the Illinois River basin, Arkansas and Oklahoma, 1997-2001 Publication/Creation: Oklahoma City, OK : U.S. Dept. of the Interior, U.S. Geological Survey, Water-Resources Division, 2003 Resource Type: Book Access & Availability: Loading