Houser, B.B., and Gettings, M.E., 2000, Stratigraphy and tectonic history of the Tucson basin, based on re-examination of cuttings and geophysical logs of the Exxon State (32)-1 well: U.S. Geological Survey Open-File Report 00-0139, 38 p., 7 sheets.
Cienega Gap area
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.
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.
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.).
Herbert, R.A., 1977, Effect of illuviated deposits on infiltration rates and denitrification during sewage effluent recharge, in White, L.M., ed., Hydrology and water resources in Arizona and the Southwest, V. 7: American Water Resources Association, Arizona Section, and Arizona Academy of Science, Hydrology Section, Annual Meeting, Las Vegas, Nev., 1977, Proceedings, p. 183-190.
Rillito Creek Hydrological Research Committee, 1959, Capturing additional water in the Tucson area: University of Arizona and U.S. Geological Survey Open-File Report, 57 p., 2 sheets, scales 1:95,000 and 1:126,720.
Pima Association of Governments, 1994, Water quality: State of the region report: Tucson, Ariz.,  p.