21. Description and evaluation of selected methods used to delineate wellhead-protection areas around public-supply wells near Mt. Hope, Kansas Author/Creator: Hansen, Cristi V., author Publication/Creation: Lawrence, Kansas : U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading
22. Determination of water use in Rockford and Kankakee areas, Illinois Author/Creator: LaTour, John K., author Publication/Creation: Urbana, Illinois : U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading
23. Distribution of aquatic macrophytes in 15 lakes and streams in South Carolina, 1985 Author/Creator: Patterson, Glenn G., author Publication/Creation: Columbia, South Carolina : U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading
24. Distribution of selected herbicides and nitrate in the Mississippi River and its major tributaries, April through June 1991 Author/Creator: Goolsby, D. A., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading
25. The effects of coal mining on the hydrologic environment of selected stream basins in southern West Virginia Author/Creator: Borchers, James W., author Publication/Creation: Charleston, West Virginia : U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading
26. Effects of impoundments on water quality of streams in the Coteau des Prairies--upper Minnesota River basin Author/Creator: Smith, C. J., author Publication/Creation: Washington, D.C. : United States Government Printing Office, 1961 Resource Type: Book Access & Availability: Loading
27. Effects of land disposal of municipal sewage sludge on soil, streambed sediment, and ground- and surface-water quality at a site near Denver, Colorado Author/Creator: Gaggiani, Neville G., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading
28. Effects of land-management practices on sediment yields in northeastern Guilford County, North Carolina Author/Creator: Hill, Catherine L., author Publication/Creation: Raleigh, North Carolina : U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading
29. The effects of multipurpose reservoirs on the water temperature of the North and South Santiam rivers, Oregon Author/Creator: Hansen, R. Peder, author Publication/Creation: Portland, Oregon : U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading
30. Effects of nitrogen and phosphorus additions on phytoplankton productivity and chlorophyll a in a subtropical estuary, Charlotte Harbor, Florida Author/Creator: Montgomery, Ralph T., author Publication/Creation: Tallahassee, Florida : U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading