51. Nutrient sources and analysis of nutrient water-quality data, Apalachicola-Chattahoochee-Flint River basin, Georgia, Alabama, and Florida, 1972-90 Author/Creator: Frick, Elizabeth A., author Publication/Creation: Atlanta, Georgia : U.S. Department of the Interior, U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading
52. Nutrient loading to Lewisville Lake, north-central Texas, 1984-87 Author/Creator: Gain, W. Scott, author Publication/Creation: Austin, Texas : U.S. Geological Survey, 1995 Resource Type: Book Access & Availability: Loading
53. Natural radioactivity in, and inorganic chemistry of, ground water in the Kirkwood-Cohansey aquifer system, southern New Jersey, 1983-89 Author/Creator: Kozinski, Jane, author Publication/Creation: West Trenton, New Jersey : U.S. Geological Survey, 1995 Resource Type: Book Access & Availability: Loading
54. Nutrients in ground water and surface water of the United States--an analysis of data through 1992 Author/Creator: Mueller, David K., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1995 Resource Type: Book Access & Availability: Loading
55. Numerical simulation of regional changes in ground-water levels and in the freshwater-saltwater interface induced by increased pumpage at Barbers Point Shaft, Oahu, Hawaii Author/Creator: Souza, William R. Publication/Creation: Honolulu, Hawaii : U.S. Dept. of the Interior, U.S. Geological Survey, 1995 Resource Type: Book Access & Availability: Loading
56. Nonlinear-regression flow model of the Gulf Coast aquifer systems in the south-central United States Author/Creator: Kuiper, Logan K., author Publication/Creation: Austin, Texas : U.S. Geological Survey, 1994 Resource Type: Book Access & Availability: Loading
57. Nutrients, suspended sediment, and pesticides in waters of the Red River of the North Basin, Minnesota, North Dakota, and South Dakota, 1970-90 Author/Creator: Tornes, L. H. (Lan H.), author Publication/Creation: Mounds View, Minnesota : U.S. Geological Survey, 1994 Resource Type: Book Access & Availability: Loading
58. Nitrate in ground water and spring water near four dairy farms in North Florida, 1990-93 Author/Creator: Andrews, William J., 1962- author Publication/Creation: Tallahassee, Florida : U.S. Geological Survey, 1994 Resource Type: Book Access & Availability: Loading
59. A numerical solution for the diffusion equation in hydrogeologic systems Author/Creator: Ishii, Audrey L., author Publication/Creation: Urbana, Illinois : U.S. Geological Survey, [1989] Resource Type: Book Access & Availability: Loading
60. Nomenclature of regional hydrogeologic units of the Southeastern Coastal Plain aquifer system Author/Creator: Miller, James A. 1939- (James Anderson), author Publication/Creation: Atlanta, Georgia : U.S. Geological Survey, 1988 Resource Type: Book Access & Availability: Loading