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Seaber, P.R., Brahana, J.V., and Hollyday, E.F., 1988, Region 20, Appalachian Plateaus and Valley and Ridge, in Back, William, Rosenshein, J.S., and Seaber, P.R., eds., Hydrogeology: Geological Society of America, The Geology of North America, v. 0-2, p. 189-200.
Trainer, F.W., and Watkins, F.W., Jr., 1975, Geohydrologic reconnaissance of the upper Potomac River Basin: U.S. Geological Survey Water-Supply Paper 2035, 68 p.
U.S. Geological Survey, 1990, National water summary, 1987-Hydrologic events and water supply and use: U.S. Geological Survey Water-Supply Paper 2350, 553 p.
Virginia Division of Mineral Resources, 1993, Geologic map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000, 1 sheet.
Wyrick, G.G., 1968, Ground-water resources of the Appalachian region: U.S. Geological Survey Hydrologic Investigations Atlas HA-295, scale 1:3,168,000, 4 sheets.
Bain, G.L., 1970, Salty groundwater in the Pocatalico River Basin: West Virginia Geological and Economic Survey Circular 11, 31 p.
Bain, G.L., and Friel, E.A., 1972, Water resources of the Little Kanawha River Basin, West Virginia: West Virginia Geological and Economic Survey River Basin Bulletin 2, 122 p.
Baldwin, H.L., and McGuinness, C.L., 1963, A primer on ground water: U.S. Geological Survey, 26 p.
Berg, T.M., and others, compilers, 1980, Geologic map of Pennsylvania: Pennsylvania Bureau of Topographic and Geologic Survey, 4th ser., scale 1:250,000, 3 sheets.
Calver, J.L., and others, compilers, 1963, Geologic map of Virginia: Virginia Department of Conservation and Economic Development, Division of Mineral Resources, scale 1:500,000, 1 sheet.
Cardwell, D.H., Erwin, R.B., and Woodward, H.P., comp., 1968, Geologic map of West Virginia: West Virginia Geologic and Economic Survey, scale 1:250,000, 2 sheets.
Cleaves, E.T., Edwards, Jonathan, Jr., and Glaser, J.D., compilers, 1968, Geologic map of Maryland: Maryland Geological Survey, scale 1:250,000, 1 sheet.
Davis, S.N., 1988, Sandstones and shales, in Back, William, Rosenshein, J.S., and Seaber, P.R., eds., Hydrogeology: Geological Society of America, The Geology of North America, v. 0-2, p. 323-332.
Doll, W.L., Meyer, Gerald, and Archer, R.J., 1963, Water resources of West Virginia: West Virginia Department of Natural Resources, Division of Water Resources, 134 p.
Ehlke, T.A., McCauley, S.D., Schultz, R.A., Bader, J.S., Runner, G.S., and Downs, S.C., 1983, Hydrology of Area 10, eastern coal province, West Virginia and Virginia [Greenbrier River, Bluestone River, New River]: U.S. Geological Survey Water-Resources Investigation Open-File Report 82-864, 73 p.
Ehlke, T.A., Runner, G.S., and Downs, S.C., 1982, Hydrology of Area 9, eastern coal province, West Virginia [Kan-awha River, Coal River, New River, Elk River]: U.S. Geological Survey Water Resources Investigations Open-File Report 81-902, 63 p.
Fenneman, N.M., and Johnson, D.W., 1946, Physical divisions of the United States: U.S. Geological Survey, scale 1:7,000,000, 1 sheet.
Friel, E.A., Ehlke, T.A., Hobba, W.A., Ward, S.M., and Schultz, R.A., 1987, Hydrology of Area 8, eastern coal province, West Virginia and Ohio [Little Kanawha River, Hocking River, Ohio River]: U.S. Geological Survey Water-Resources Investigations Open-File Report 84-463, 78 p.
Harlow, G.E., Jr., and LeCain, G.D., 1993, Hydraulic characteristics of, and ground-water flow in, coal-bearing rocks of southwestern Virginia: U.S. Geological Survey Water-Supply Paper 2388, 36 p.
Herb, W.J., Shaw, L.C., and Brown, D.E., 1981a, Hydrology of Area 3, eastern coal province, Pennsylvania [Lower Allegheny River, Kiskiminetas River, Mahoning Creek, Redbank Creek]: U.S. Geological Survey Water-Resources Investigations Open-File Report 81-537, 88 p.
_______1981b, Hydrology of Area 5, eastern coal province, Pennsylvania, Maryland, and West Virginia [Yough-ioheny, Monongahela, Tygart Valley, and Cheat Rivers]: U.S. Geological Survey Water-Resources Investigations Open-File Report 81-538, 92 p.
Hobba, W.A., Jr., 1981, Effects of underground mining and mine collapse on the hydrology of selected basins, West Virginia: West Virginia Geological and Economic Survey Report of Investigations RI-33, 77 p.
Kiesler, Jay, Quinones, Ferdinand, Mull, D.S., and York, K.L., 1983, Hydrology of Area 13, eastern coal province, Kentucky, Virginia, and West Virginia [Big Sandy River, Levisa Fork, Tug Fork, Blaine Creek]: U.S. Geological Survey Water-Resources Investigations Open-File Report 82-505, 112 p.
Leggette, R.M., 1936, Ground water in northwestern Pennsylvania: Pennsylvania Geological Survey Bulletin W-3, 4th ser., 215 p.
Lessing, Peter, and Hobba, W.A., Jr., 1981, Abandoned coal mines in West Virginia as sources of water supplies: West Virginia Geological and Economic Survey Circular C-24, 18 p.
Lohman, S.W., 1937, Ground water in northeastern Pennsylvania: Pennsylvania Geological Survey Bulletin W-4, 4th ser., 312 p.
_______1938, Ground water in south-central Pennsylvania: Pennsylvania Geological Survey Bulletin W-5, 4th ser., 315 p.
_______1939, Ground water in north-central Pennsylvania: Pennsylvania Geological Survey Bulletin W-6, 4th ser., 219 p.
Patchen, D.G., and others, 1985a, Correlation of stratigraphic units of North America (COSUNA) Project, southern Appalachian region: American Association of Petroleum Geologists, 1 sheet.
_______1985b, Correlation of stratigraphic units of North America (COSUNA) Project, northern Appalachian region: American Association of Petroleum Geologists, 1 sheet.
Piper, A.M., 1933, Ground water in southwestern Pennsylvania, with analyses by M.D. Foster and C.S. Howard: Pennsylvania Geological Survey Bulletin W-1, 4th ser., 406 p.
Poth, C.W., 1962, The occurrence of brine in western Pennsylvania: Pennsylvania Geological Survey Bulletin M-47, 4th ser., 53 p.
Roth, D.K., Engelke, M.J., Jr., and others, 1981, Hydrology of Area 4, eastern coal province, Pennsylvania, Ohio, and West Virginia [Upper Ohio River, Shenango River, Mahoning River, Beaver River]: U.S. Geological Survey Water-Resources Investigations Open-File Report 81-343, 62 p.
Seaber, P.R., Brahana, J.V., and Hollyday, E.F., 1988, Region 20, Appalachian Plateaus and Valley and Ridge, in Back, William, Rosenshein, J.S., and Seaber, P.R., eds., Hydrogeology: Geological Society of America, The Geology of North America, v. 0-2, p. 189-200.
U.S. Geological Survey, 1990, National water summary, 1987-Hydrologic events and water supply and use: U.S. Geological Survey Water-Supply Paper 2350, 553 p.
Virginia Division of Mineral Resources, 1993, Geologic map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000, 1 sheet.
Wagner, W.R., Heyman, Louis, Gray, R.E., Belz, D.J., Lund, Richard, Cate, A.S., and Edgerton, C.D., 1970, Geology of the Pittsburgh area: Pennsylvania Geological Survey Bulletin G-59, 4th ser., 145 p.
Ward, Porter, and Wilmoth, B.M., 1968, Ground-water hydrology of the Monongahela River Basin in West Virginia: West Virginia Geological and Economic Survey River Basin Bulletin 1, 54 p.
Wright, W.G., 1985, Effects of fracturing on well yields in the coalfield areas of Wise and Dickenson Counties, southwestern Virginia: U.S. Geological Survey Water-Resources Investigations Report 85-4061, 21 p.
Wyrick, G.G., 1968, Ground-water resources of the Appalachian region: U.S. Geological Survey Hydrologic Investigations Atlas HA-295, scale 1:3,168,000, 4 sheets.
Wyrick, G.G., and Borchers, J.W., 1981, Hydrologic effects of stress-relief fracturing in an Appalachian valley: U.S. Geological Survey Water-Supply Paper 2177, 51 p.
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