Books by California Bureau Mines
Gold Placer Mining in Californ
Gold Placer Mining in California
Mines of Calaveras County Cali
Mines of Calaveras County California
Mines of Colusa, Glenn, Lake,
Mines of Colusa, Glenn, Lake, Marin, Napa, Solano, Sanoma and Yolo Counties
Mines of Kern County Californi
Mines of Kern County California
Mines of Trinity County Califo
Mines of Trinity County California
Gold Dredging in California