21. Geologic structure and altitude of the top of the Minnelusa Formation, northeastern Black Hills, South Dakota Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Huron, South Dakota : Department of the Interior, United States Geological Survey, 1985 Resource Type: Map Access & Availability: Loading
22. Ground-water availability in the central part of the Lake Ontario Basin, New York Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Albany, New York : Department of the Interior, U.S. Geological Survey, 1988 Resource Type: Map Access & Availability: Loading
23. Ground-water levels in the lower Paleozoic and Precambrian crystalline rocks, of East Bradford and West Bradford townships, Chester County, Pennsylvania, July and August 1987 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Va.] : Department of the Interior, U.S. Geological Survey, 1988 Resource Type: Map Access & Availability: Loading
24. Geohydrologic sections of Louisiana Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Baton Rouge, Louisiana : Department of the Interior, U.S. Geological Survey, 1989 Resource Type: Map Access & Availability: Loading
25. Ground-water levels spring 1985, and ground-water level changes spring 1983 to spring 1985, in three basalt units underlying the Columbia Plateau, Washington and Oregon Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Tacoma, Washington : Department of the Interior, United States Geological Survey, 1989 Resource Type: Map Access & Availability: Loading
26. Ground-water use by public-supply systems in Tennessee in 1985 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Nashville, Tennessee : Department of the Interior, U.S. Geological Survey, 1989 Resource Type: Map Access & Availability: Loading
27. Geohydrology of the Morrison Formation in the western San Juan Basin, New Mexico Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Albuquerque, New Mexico : U.S. Department of the Interior, U.S. Geological Survey, 1990 Resource Type: Map Access & Availability: Loading
28. Geohydrology of the surficial aquifer in the Hornell area, in Steuben and Allegany counties, New York Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Ithaca, New York : Department of the Interior, U.S. Geological Survey, 1990 Resource Type: Map Access & Availability: Loading
29. Geology, structure, and thickness of hydrogeologic units in part of the Columbia Plateau, Oregon Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Portland, Oregon : Department of the Interior, United States Geological Survey, 1990 Resource Type: Map Access & Availability: Loading
30. Generalized potentiometric surfaces of the Red River alluvial aquifer, pool 1, Red River Waterway Area, central Louisiana Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Baton Rouge, Louisiana : U.S. Department of the Interior, U.S. Geological Survey, 1991 Resource Type: Map Access & Availability: Loading