Pickard, B.O., 1912, The Apache Mines of the Owl Head District, Arizona: Mining Science, v. 66, May 30, 1912, p. 473-475.
Pickard, B.O.
Mining Science, v. 66, May 30, 1912, p. 473-475.
Mining, Areal, Mineralization, Copper, Lead, Gold, Silver, History, Production,
