Reference | {Deposit:: LINDGREN, W., GRATON, L.C., AND GORDON, C.H., 1910 USGS PP 68, P. 191-201}{Deposit:: SCOTT, D.B., 1920 TRANSACTIONS OF AMERICAN INSTITUTE OF MINING ENGINEERS, VOL 63, P. 289-310}{Deposit:: FERGUSON, H.G., 1921 USGS BULL 715-L, P. 171-204}{Deposit:: FERGUSON, H.G., 1927 USGS BULL 787, 100 PAGES}{Deposit:: METZGER, O.H., 1938 USBM IC-6987, P. 39} |