Tolman, C.F., Jr., 1909, The southern Arizona copper fields [Part II]: Mining and Scientific Press, v. 99, no. 12, p. 390-393.
Tolman, C.F., Jr.
Mining and Scientific Press, v. 99, no. 12, p. 390-393.
Mineral District, Porphyry Copper, Mineralization, Mining Engineering,