Search for: Title Author Subject Series that begins with: 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings > Browse Headings # Ore-dressing plants 1 Ore-dressing plants -- California -- Grass Valley -- Models. 1 Ore-dressing plants -- Colorado -- Black Hawk. 1 Ore-dressing plants -- Colorado -- Boulder County -- History. 2 Ore-dressing plants -- Colorado -- Clear Creek -- Pictorial works. 1 Ore-dressing plants -- Colorado -- Eagle County -- History -- Pictorial works. 1 Ore-dressing plants -- Colorado -- Gilpin County -- 19th century. 2 Ore-dressing plants -- Colorado -- Idaho Springs -- History. 1 Ore-dressing plants -- Colorado -- Jefferson County. 6 Ore-dressing plants -- Environmental aspects -- Nevada -- Humboldt River Watershed. 1 10 20 30 50 100 per page < Previous 10 Headings Next 10 Headings >