Silver

Duff, G.J., and Kumke, C.A., 1950, Mining and milling methods at San Xavier Mine, the Eagle-Picher Mining and Smelting Co., Pima County, Ariz.: U.S. Bureau of Mines Information Circular I.C. 7581, 13 p.

Richard, S.M., 1999, Geology of the Socorro Mine - White Marble Mine area, western Harquahala Mountains, west-central Arizona: Arizona Geological Survey Open-File Report 99-09, 35 p., 2 sheets, scale 1:12,000.

Norman, Sidney, 1919, Kay Copper big mine: Northwest Mining Truth [Spokane, Wash.], v. 4, no. 5, April 18, p. 1.

Villalobos, H.A., and Hamm, L.W., 1980, Summary report of the mineral resource appraisal of the Paiute Instant (Primitive) Study Area, Mohave County, Arizona: U.S. Geological Survey Open-File Report 80-0984, 2 sheets, scales 1:24,000 and 1:100,000.

U.S. Bureau of Mines, 1945, Bullard Mine, Pierce Mining District, Yavapai County, Ariz.: U.S. Bureau of Mines War Minerals Report 453, 5 p.

U.S. Bureau of Mines, 1945, Apex property, Coconino County, Ariz.: U.S. Bureau of Mines War Minerals Report 436, 8 p.

U.S. Bureau of Mines, 1945, Effect of the war upon mining and metallurgy in Arizona: U.S. Bureau of Mines War Minerals Report 403, 34 p.

U.S. Bureau of Mines, 1944, Sullivan Mine, Cochise County, Ariz.: U.S. Bureau of Mines War Minerals Report 337, 8 p.

Wilt, J.C., 1995, Correspondence of alkalinity and ferric/ferrous ratios of igneous rocks associated with various types of porphyry copper deposits, in Pierce, F.W., and Bolm, J.G., eds., Porphyry copper deposits of the American Cordillera: Arizona Geological Society Digest 20, p. 180-200.

Long, K.R., 1995, Production and reserves of Cordilleran (Alaska to Chile) porphyry copper deposits, in Pierce, F.W., and Bolm, J.G., eds., Porphyry copper deposits of the American Cordillera: Arizona Geological Society Digest 20, p. 35-68.