Hahman, F., Sr. [sic], Mancini, F., White, D., Chebab, M., Goldstone, L., and Weibel, B., 1980, Evaluation of geothermal energy in Arizona - Final report by Arizona Geothermal Planning Team - Volume 2 of 2, January 1 - December 31, 1979: U.S. Department of Energy, and Four Corners Regional Development Commission, 61 p. [first author name should be Hahman, W.R., Sr.].
Casa Grande area
Arizona Bureau of Geology and Mineral Technology, 1987, Subsidence areas and earth-fissure zones: Fieldnotes [Arizona Bureau of Geology and Mineral Technology], v. 17, no. 1, p. 6-9.
Ahlness, J.K., and Millenacker, D.I., 1989, In situ copper mining field research project, in In situ leach mining, Proceedings - Bureau of Mines Technology Transfer Seminars, Phoenix, AZ, April 4, and Salt Lake City, UT, April 6, 1989: U.S. Bureau of Mines Information Circular I.C. 9216, p. 4-6.
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.
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.