Reference | {Deposit:: OBRIEN, J.C., 1949, MINES AND MINERAL RESOURCES OF BUTTE COUNTY, CALIF.: CALIF. JOURNAL OF MINES AND GEOLOGY, V. 45, NO. 3, P. 450, PL. 8}{Deposit:: PRESTON, E. B., 1893, BUTTE COUNTY, CALIF: CALIF. JOUR. MINES AND GEOLOGY, V. 11, P. 158} |