1. Observations of environmental change in Grand Canyon, Arizona Author/Creator: Webb, Robert H. Publication/Creation: U.S. Geological Survey, Information Services [distributor]. Resource Type: Book Access & Availability: Loading
2. Observed and predicted pier scour in Maine Author/Creator: Hodgkins, Glenn, author Publication/Creation: Augusta, Maine : U.S. Department of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
3. Occurrence and distribution of dissolved trace elements in the surface waters of the Yakima River Basin, Washington Author/Creator: Hughes, Curt A. Publication/Creation: Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor]. Resource Type: Book Access & Availability: Loading
4. 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: Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor] Resource Type: Book Access & Availability: Loading
5. 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
6. Occurrence and distribution of nutrients, suspended sediment, and pesticides in the Mobile River basin, Alabama, Georgia, Mississippi, and Tennessee, 1999-2001 Author/Creator: McPherson, Ann K. Publication/Creation: Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor]. Resource Type: Book Access & Availability: Loading
7. Occurrence and distribution of pesticides in the St. Lucie River watershed, south-central Florida, 2000-01, based on Enzyme-Linked Immunosorbent Assay (ELISA) screening Author/Creator: Lietz, A. C. Publication/Creation: Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor]. Resource Type: Book Access & Availability: Loading
8. Occurrence and implications of methyl tert-butyl ether and gasoline hydrocarbons in ground water and source water in the United States and in drinking water in 12 northeast and mid-atlantic states, 1993-2002 Author/Creator: Moran, Michael J. 1962- (Michael James) Publication/Creation: Rapid City, S.D. : U.S. Dept. of the Interior, U.S. Geological Survey, 2004 Resource Type: Book Access & Availability: Loading
9. Occurrence and status of volatile organic compounds in ground water from rural, untreated, self-supplied domestic wells in the United States, 1986-99 Publication/Creation: Rapid City, SD : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
10. Occurrence and temporal variability of methyl tert-butyl ether (MTBE) and other volatile organic compounds in select sources of drinking water : results of the focused survey Author/Creator: Delzer, Gregory C. Publication/Creation: Rapid City, S.D. : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
11. 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
12. Occurrence and transport of diazinon in the Sacramento River, and selected tributaries, California, during two winter storms, January-February 2001 Publication/Creation: Sacramento, Calif. : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
13. Occurrence of and trends in selected sediment-associated contaminants in Caddo Lake, East Texas, 1940-2002 Author/Creator: Wilson, Jennifer T., 1973- Publication/Creation: Denver, CO : U.S. Geological Survey, Information Services [distributor]. Resource Type: Book Access & Availability: Loading
14. 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
15. Occurrence of volatile organic compounds in drinking water from the United States : results from archived chromatograms and water samples, 1989-2000 Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
16. Occurrence of volatile organic compounds in drinking water from the United States : results from archived chromatograms and water samples, 1989-2000 Publication/Creation: Denver, CO : U.S. Geological Survey, Information Services [distributor] Resource Type: Book Access & Availability: Loading
17. Occurrence, trends, and sources in particle-associated contaminants in selected streams and lakes in Fort Worth, Texas Publication/Creation: Denver, CO : U.S. Geological Survey, Information Services [distributor]. Resource Type: Book Access & Availability: Loading
18. Organic and trace element contaminants in water, biota, sediment, and semipermeable membrane devices at the Tres Rios Treatment Wetlands, Phoenix, Arizona Publication/Creation: Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
19. Organic carbon trends, loads, and yields to the Sacramento-San Joaquin Delta, California, water years 1980-2000 Publication/Creation: Sacramento, Calif. : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
20. Overview of water resources in and near Wichita and Affiliated Tribes treaty lands in western Oklahoma Publication/Creation: Oklahoma City, OK : U.S. Dept. of the Interior, U.S. Geological Survey, 2003 Resource Type: Book Access & Availability: Loading
21. Oxidation-reduction processes in ground water at Naval Weapons Industrial Reserve Plant, Dallas, Texas Author/Creator: Jones, S. A. 1852-1933. (S. Armistead) Publication/Creation: Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor]. Resource Type: Book Access & Availability: Loading