du Bray, E.A., Pallister, J.S., and Snee, L.W., 2004, Geochemistry and geochronology of middle Tertiary volcanic rocks of the central Chiricahua Mountains, southeast Arizona: U.S. Geological Survey Professional Paper 1684, 57p.
Winograd, I.J., 1971, Hydrogeology of ash flow tuff: a preliminary statement: Water Resources Research, v. 7, n. 4, p. 994-1006
Ash, N.A., 1997, Physical volcanology of the Santa Maria Mountains volcanic field, Yavapai County, Arizona: Flagstaff, Northern Arizona University, M.S. thesis, 102 p., 1 sheet, scale 1:24,000.
Ratte, J.C., Marvin, R.F., Naeser, C.W., and Bikerman, M., 1984, Calderas and ash flow tuffs of the Mogollon Mountains, southwestern New Mexico: Journal of Geophysical Research, v. 89, no. B10, p. 8713-8732.
Richard, S.M., Ferguson, C.A., Spencer, J.E., Youberg, Ann, and Orr, T.R., 2000, Geologic map of the Waterman Peak 7.5' quadrangle and northern La Tortuga Butte 7.5' quadrangle, Pima County, Arizona: Arizona Geological Survey Digital Geologic Map Series DGM-02, 1 CD-ROM (30 p., 1 sheet, scale 1:24,000).
Ferguson, C.A., Gilbert, W.G., Pearthree, P.A., and Biggs, T.H., 2000, Geologic map of the southern Roskruge Mountains (the San Pedro and the southern half of La Tortuga Butte 7.5' quadrangles), Pima County, Arizona: Arizona Geological Survey Open-File Report 00-06, 40 p., 2 sheets, scale 1:24,000.
Lipman, P.W., 1994, Tucson Mountains caldera - A Cretaceous ash-flow caldera in southern Arizona, in Thorman, C.H., and Lane, D.E., eds., USGS Research on Mineral Resources - 1994, Part B - Guidebook for Field Trips, Ninth V.E. McKelvey Forum on Mineral and Energy Resources: U.S. Geological Survey Circular 1103-B, p. 89-102.