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Upper San Pedro
Wallace, D.E., and Cooper, L.R., 1970, Dispersion of naturally occurring ions in groundwater from various rock types in a portion of the San Pedro River basin, Arizona: Journal of Hydrology, v. 10, no. 4, p. 391-405.
Skirvin, S.M., 1991, Use of processed Landsat Thematic Mapper data to detect surface soil moisture over mountain pediments, southeastern Arizona: Tucson, University of Arizona, M.S. thesis, 57 p.
Realmuto, V.J., 1990, Mapping the distribution of wet soils through the use of reflectance modeling: Dragoon Mountains, Cochise County, Arizona: Tucson, University of Arizona, Ph.D. dissertation, 167 p.
Arizona Department of Water Resources, 1990, Preliminary hydrographic survey report for the San Pedro River watershed, Volume 1: General assessment, In re The general adjudication of the Gila River system and source: [Phoenix], Arizona Department of Water Resources,  p.
Catlin, C.N., 1926, Character of the ground-water resources of Arizona: Tucson, University of Arizona, College of Agriculture, Agricultural Experiment Station, Bulletin no. 114, p. 173-293.
Smith, H.V., Caster, A.B., Fuller, W.H., Breazeale, E.L., and Draper, George, 1949, The chemical composition of representative Arizona waters: Tucson, University of Arizona, College of Agriculture, Agricultural Experiment Station, Bulletin 225, 76 p.
Soil Conservation Service, Economic Research Service, Forest Service, and Arizona Water Commission, 1977, Santa Cruz-San Pedro River basin, Arizona: Resource inventory: U.S. Department of Agriculture Soil Conservation Service,  p.
Ligner, J.J., White, N.D., Kister, L.R., and Moss, M.E., 1969, Water resources: Part II of Mineral and water resources of Arizona: Arizona Bureau of Mines Bulletin 180, p. 471-580.
U.S. Geological Survey, 1983, Annual summary of ground-water conditions in Arizona, Spring 1981 to Spring 1982: U.S. Geological Survey Open-File Report 82-1009, 2 sheets, scales 1:1,000,000 and 1:3,200,000.