Pedregosa Mts.

Darton, N.H., 1933, Guidebook of the western United States, Part F, The Southern Pacific lines, New Orleans to Los Angeles: U.S. Geological Survey Bulletin 845, 300 p.

Coates, D.R., and Cushman, R.L., 1955, Geology and ground-water resources of the Douglas basin, with a section on Chemical quality of the ground water, by J.L. Hatchett: U.S. Geological Survey Water-Supply Paper 1354, 56 p., 5 sheets, scale 1:211,000.

Boyd, D.T., 1978, Stratigraphic relations within the Devonian Martin, Swisshelm, and Portal formations of Cochise County, Arizona: Tucson, University of Arizona, M.S. thesis, 76 p.

Bilodeau, W.L., and Lindberg, F.A., 1983, Early Cretaceous tectonics and sedimentation in southern Arizona, southwestern New Mexico, and northern Sonora, Mexico, in Reynolds, M.W., and Dolly, E.D., eds., Mesozoic paleogeography of the west-central United States - Rocky Mountain Paleogeography Symposium 2, Denver, Colo., 1983: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section, Denver, Colo., p. 173-188.

Armstrong, A.K., Mamet, B.L., and Repetski, J.E., 1980, The Mississippian System of New Mexico and southern Arizona, in Fouch, T.D., and Magathan, E.R., eds., Paleozoic paleogeography of the west-central United States - Rocky Mountain Paleogeography Symposium 1, Denver, Colo., 1980: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section, Denver, Colo., p. 82-99.

Arizona Bureau of Mines, 1959, Geologic map of Cochise County, Arizona: Arizona Bureau of Mines, 1 sheet, scale 1;375,000 [now available as Arizona Geological Survey Map M-3-1].

Andreasen, G.E., Mitchell, C.M., and Tyson, N.S., 1965, Aeromagnetic map of Tombstone and vicinity, Cochise and Santa Cruz Counties, Arizona: U.S. Geological Survey Open-File Report (Geophysical Investigations Preliminary Map), 1 sheet, scale 1:125,000.