Gettings, M.E., 2002, An interpretation of the 1996 aeromagnetic data for the Santa Cruz basin, Tumacacori Mountains, Santa Rita Mountains, and Patagonia Mountains, south-central Arizona: U.S. Geological Survey Open-File Report 02-0099 [available only online: http://geopubs.wr.usgs.gov/open-file/of02-99/].
Kennard, Michele, Johnson, A.E., and Perry, T.W., 1988, Preliminary report on the hydrology of Cienega Creek Groundwater Basin: Arizona Department of Water Resources, Division of Hydrology, Special Studies, 11 p.
Nuzman, C., 1970, Water supply and utilization, Empire-Sonoita planning area, Pima and Santa Cruz Counties, Arizona: Layne-Western Company, Inc.,  p.
Geraghty and Miller, Incorporated, 1970, Ground water report, Empire Ranch area, Pima and Santa Cruz Counties, Arizona: [publication source and pagination unknown].
E.L. Montgomery and Associates, 1985, Water adequacy report: Stage one development, Empirita Ranch area, Pima County, Arizona: Arizona Department of Water Resources, contractor report, 48 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.
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.
Turner, S.F., and others, 1943, Ground-water resources of the Santa Cruz Basin, Arizona: U.S. Geological Survey Open-File Report [unnumbered], Tucson, Ariz., May 14, 1943,  p., 3 sheets, scales 1:23,000, 1:200,000, and 1:500,000.
Arizona Department of Water Resources, 2000, Third Management Plans, 2000-2010, ver. 1.0: Arizona Department of Water Resources, 1 CD-ROM (2,340 p.).