Schwartz, G.M., 1938, Oxidized copper ores of the United Verde Extension mine: Economic Geology, v. 33, no. 1, p. 21-33.
Schwartz, G.M.
Economic Geology, v. 33, no. 1, p. 21-33.
Mineral District, Supergene Enrichment, Massive Sulfide, Mineralization, Copper, Proterozoic,
