Agenbroad, L.D., Middleton, L.T., Mead, J.I., and Davis, Owen, 1983, A Late Pleistocene mastodon (Mammut americanum) from Pinal County, Arizona [abs.]: Arizona-Nevada Academy of Science, Journal, v. 18, Proceedings Supplement, p. 61.
Lower San Pedro-Mam
Agenbroad, L.D., 1984, Recent valley deposits in southern Arizona, in Smiley, T.L., Nations, J.D., Pewe, T.L., and Schafer, J.P., eds., Landscapes of Arizona - The geological story: Lanham, Md., University Press of America, p. 253-268.
Agenbroad, L.D., 1967, Cenozoic stratigraphy and paleo-hydrology of the Redington-San Manuel area, San Pedro Valley, Arizona: Tucson, University of Arizona, Ph.D. dissertation, 119 p., 4 sheets, scales 1:31,250, and 1:62,500.
Adams, E.D., 1972, General soil map, Pinal County, Arizona - March 1971 (revised April 1972): U.S. Department of Agriculture, Soil Conservation Service, 45 p., 1 sheet, scale 1:500,000.
Adam, D.P., and Mehringer, P.J., Jr., 1975, Modern pollen surface samples, an analysis of subsamples: U.S. Geological Survey Journal of Research, v. 3, no. 6, p. 733-736.