41. Water-quality assessment of the Ozark plateaus study unit, Arkansas, Kansas, Missouri, and Oklahoma : summary of information on pesticides, 1970-90 Author/Creator: Bell, Richard W. (Hydrogeologist), author Publication/Creation: Little Rock, Arkansas : U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading
42. Water-quality assessment of the Potomac River Basin : analysis of available pesticide data, 1972-90 Author/Creator: Zappia, Humbert, author Publication/Creation: Baltimore, Maryland : U.S. Geological Survey, 1997 Resource Type: Book Access & Availability: Loading
43. Water-quality assessment of the Potomac River Basin : basin description and analysis of available nutrient data, 1970-90 Author/Creator: Blomquist, Joel D., author Publication/Creation: Towson, Maryland : U.S. Department of the Interior, U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading
44. Water-quality assessment of the Puget Sound basin, Washington--environmental setting and its implications for water quality and aquatic biota Author/Creator: Staubitz, W. W. (Ward W.), author Publication/Creation: Tacoma, Washington : U.S. Geological Survey, 1997 Resource Type: Book Access & Availability: Loading
45. Water-quality assessment of the Rio Grande Valley, Colorado, New Mexico, and Texas : occurrence and distribution of selected pesticides and nutrients at selected surface-water sites in the Mesilla Valley, 1994-95 Author/Creator: Healy, Denis F., author Publication/Creation: Albuquerque, New Mexico : U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading
46. Water-quality assessment of the Rio Grande Valley, Colorado, New Mexico and Texas : organic compounds and trace elements in bed sediment and fish tissue, 1992-93 Author/Creator: Carter, Lisa F., author Publication/Creation: Albuquerque, New Mexico : U.S. Geological Survey, 1997 Resource Type: Book Access & Availability: Loading
47. Water-quality assessment of the Rio Grande Valley, Colorado, New Mexico, and Texas : shallow ground-water quality of a land-use area in the San Luis Valley, south-central Colorado, 1993 Author/Creator: Anderholm, Scott K., author Publication/Creation: Albuquerque, New Mexico : U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading
48. Water-quality assessment of the Rio Grande Valley, Colorado, New Mexico and Texas--fish communities at selected sites, 1993-95 Author/Creator: Carter, Lisa F., author Publication/Creation: Albuquerque, New Mexico : U.S. Geological Survey, 1997 Resource Type: Book Access & Availability: Loading
49. Water-quality assessment of the Trinity River Basin, Texas : nutrients and pesticides in the watersheds of Richland and Chambers creeks, 1993-95 Author/Creator: Land, Larry F., author Publication/Creation: Austin, Texas : U.S. Geological Survey, 1997 Resource Type: Book Access & Availability: Loading
50. Water-quality assessment of the Trinity River Basin, Texas : pesticides in streams draining an urban and an agricultural area, 1993-95 Author/Creator: Land, Larry F., author Publication/Creation: Austin, Texas : U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading