Reference | {Deposit:: GOODWIN, J.G., 1957 , LEAD AND ZINC IN CALIFORNIA; CALIF. JOUR. MINES AND GEOLOGY; VOL. 53 NO. 3 & 4,P. 415}{Deposit:: HEYL, G.R. AND ERIC, T.H., 1948 , NEWTON COPPER MINE, AMADOR COUNTY, CALIFORNIA; COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 59} |