1. Occurrence of selected trace elements and organic compounds and their relation to land use in the Willamette River basin, Oregon, 1992-94 Author/Creator: Anderson, Chauncey W., author Publication/Creation: Portland, Oregon : U.S. Department of the Interior, U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading
2. Occurrence and distribution of enteric viruses in shallow ground water and factors affecting well vulnerability to microbiological contamination in Worcester and Wicomico Counties, Maryland Author/Creator: Banks, William S. L., author Publication/Creation: Baltimore, Maryland : U.S. Department of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading
3. Occurrence and distribution of microbiological contamination and enteric viruses in shallow ground water in Baltimore and Harford counties, Maryland Author/Creator: Banks, William S. L. Publication/Creation: Baltimore, Md. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
4. Optimization of ground-water withdrawal at the old O-Field area, Aberdeen Proving Ground, Maryland Author/Creator: Banks, William S. L. Publication/Creation: Baltimore, Md. : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading
5. Occurrence of dissolved sodium in ground waters in basalts underlying the Columbia Plateau, Washington Author/Creator: Bortleson, Gilbert Carl, 1940- author Publication/Creation: Tacoma, Washington : U.S. Geological Survey, 1986 Resource Type: Book Access & Availability: Loading
6. Occurrence of pesticides in streams and ground water in the Puget Sound Basin, Washington, and British Columbia, 1996-98 Author/Creator: Bortleson, Gilbert Carl, 1940- author Publication/Creation: Tacoma, Washington : U.S. Department of the Interior, U.S. Geological Survey, 2000 Resource Type: Book Access & Availability: Loading
7. Occurrence of nitrate and pesticides in ground water beneath three agricultural land-use settings in the eastern San Joaquin Valley, California, 1993-1995 Author/Creator: Burow, Karen R., author Publication/Creation: Sacramento, California : U.S. Geological Survey, 1998 Resource Type: Book Access & Availability: Loading
8. Occurrence of arsenic in ground water of Suffolk County, New York, 1997-2002 Author/Creator: Cartwright, Richard A. Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2004 Resource Type: Book Access & Availability: Loading
9. Occurrence of dissolved solids, nutrients, atrazine, and fecal coliform bacteria during low flow in the Cheney Reservoir Watershed, south-central Kansas, 1996 Author/Creator: Christensen, Victoria G., author Publication/Creation: Lawrence, Kansas : U.S. Geological Survey, 1997 Resource Type: Book Access & Availability: Loading
10. Occurrence and transport of cadmium, lead, and zinc in the Spokane River basin, Idaho and Washington, water years 1999-2001 Author/Creator: Clark, G. M. 1958- (Gregory M.) Publication/Creation: Boise, Idaho : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading