Southwest Mining News Service, 1925, Kay Copper nearing production: Southwest Mining News Service, General Bulletin, v. 1, no. 5, p. 1, 4.
Southwest Mining News Service, General Bulletin, v. 1, no. 5, p. 1, 4.
Mining, Massive Sulfide, Copper, Gold, Silver, Proterozoic, Mineralization, Subsurface,