Upper San Pedro

Schumann, H.H., 1988, U.S. Geological Survey ground-water studies in Arizona: U.S. Geological Survey Open-File Report 88-0164, 2 p.

Peirce, H.W., and Scurlock, J.R., 1972, Arizona well information: Arizona Bureau of Mines Bulletin 185, 195 p. [reprinted 1988, Arizona Geological Survey].

Massanat, Y.M., 1972, Evaluation of factors contributing to piping erosion near Benson, Cochise County, Arizona: Tucson, University of Arizona, M.S. thesis, 73 p.

Kottlowski, F.E., 1962, Pennsylvanian rocks of southwestern New Mexico and southeastern Arizona, in Branson, C.C., ed., Pennsylvanian System in the United States - a symposium: American Association of Petroleum Geologists, p. 331-371.

Kottlowski, F.E., 1960, Summary of Pennsylvanian sections in southwestern New Mexico and southeastern Arizona: New Mexico Bureau Mines and Mineral Resources Bulletin 66, 163 p.

Hildenbrand, T.G., Simpson, R.W., Godson, R.H., and Kane, M.F., 1982, Digital colored residual and regional Bouguer gravity maps of the conterminous United States: U.S. Geological Survey Open-File Report 82-0284, 31 p.

Hassemer, J.R., Ficklin, W.H., Motooka, J.M., and Watts, K.C., 1983, Analytical results for 328 water samples from the Silver City 1o x 2o quadrangle, Arizona and New Mexico, with contributions from D.J. Preston, S.M. Smaglik, and F.N. Ward: U.S. Geological Survey Open-File Report 83-0084, 42 p., 1 sheet, scale 1:250,000.

Witcher, J.C., Stone, Claudia, and Hahman, W.R., Sr., 1982, Geothermal resources of Arizona: Arizona Bureau of Geology and Mineral Technology [also listed as Arizona Geological Survey Map 15-2], 1 sheet, scale 1:500,000.

Babcock, H.M., 1977, Annual summary of ground-water conditions in Arizona, Spring 1975 to Spring 1976: U.S. Geological Survey Water-Resources Investigations 77-0010 Open-File Report, 2 sheets, scale 1:1,000,000.

Arizona Water Commission, 1975, Arizona State Water Plan, Phase 1, Inventory of resource and uses: Arizona Water Commission, 224 p., 2 sheets, approx. scale 1:670,000.