Butler, B.S., and Wilson, E.D., 1938, Clifton-Morenci district: Arizona Bureau of Mines Bulletin no. 145, p. 72-80.
Butler, B.S., and Wilson, E.D.
Arizona Bureau of Mines Bulletin no. 145, p. 72-80.
Mineral District, Ore, Porphyry Copper, Areal, Structure, Mineralization,