Cowley, J.F., and Quayle, T.W., 1930, Development and mining methods: Mining Congress Journal, v. 16, no. 4, p. 313-337.
Cowley, J.F., and Quayle, T.W.
Mining Congress Journal, v. 16, no. 4, p. 313-337.
Mineral District, Massive Sulfide, Copper, Lead, Zinc, Proterozoic,