Richter, D.H., Houser, B.B., Watts, K.C., Klein, D.P., Sharp, W.N., Drewes, H., Hedlund, D.C., Raines, G.L., and Hassemer, J.R., 1987, The Conterminous United States Mineral Assessment Program: Background information to accompany folio of geologic and mineral resource maps of the Silver City 1o x 2o quadrangle, New Mexico and Arizona: U.S. Geological Survey Circular 975, 22 p.
Richter, D.H., and Lawrence, V.A., 1983, Mineral deposit map of the Silver City 1o x 2o quadrangle, New Mexico and Arizona: U.S. Geological Survey Miscellaneous Investigations Series Map I-1310-B, 70 p., 1 sheet, scale 1:250,000.
Richmond, D.L., 1973, General soil map, Graham County, Arizona: U.S. Department of Agriculture, Soil Conservation Service, 74 p., 1 sheet, scale 1:500,000.
Richmond, D.L., 1971, General soil map, Cochise County, Arizona: U.S. Department of Agriculture, Soil Conservation Service, 52 p., 1 sheet, scale 1:500,000.
Rehrig, W.A., and Reynolds, S.J., 1980, Geologic and geochronlogic reconnaissance of a northwest-trending zone of metamorphic core complexes in southern and western Arizona, in Crittenden, M.D., Jr., Coney, P.J., and Davis, G.H., eds., Cordilleran metamorphic core complexes: Geological Society of America Memoir 153, p. 131-157.
Rehrig, W.A., and Reynolds, S.J., 1977, A northwest zone of metamorphic core complexes in Arizona [abs.]: Geological Society of America Abstracts with Programs, v. 9, no. 7, p. 1139.
Raines, G.L., 1984, Preliminary map showing limonitic areas in the Silver City 1o x 2o quadrangle, Arizona and New Mexico: U.S. Geological Survey Miscellaneous Field Studies Map MF-1183-Q, 1 sheet, scale 1:250,000.
Place, J.L., 1976, Monitoring change in land use over large regions, in ERTS-1, A new window on our planet: U.S. Geological Survey Professional Paper 929, p. 230-233.
Peterson, J.A., Page-Nedell, S.S., and Bergquist, J.R., 1984, Map showing mineral-resource potential of U.S. Forest Service and Bureau of Land Management Wilderness Study Areas in Arizona: U.S. Geological Survey Open-File Report 84-0408, 14 p., 1 sheet, scale 1:1,000,000.
Peirce, H.W., 1983, Earth materials evaluation, Arizona RARE II areas: Arizona Bureau of Geology and Mineral Technology Open-File Report 83-13, 23 p.