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Concentration of carbonate and oxide manganese ores from the vicinity of Tracy, Central California

Beneficiation of oxide and carbonate manganese ores from the Philipsburg District, Granite County, Mont.

Concentration of oxide manganese ores from Columbia and Elberta mining districts, Tooele and Juab counties, Utah :(Wildcat, Sharp, and Aeronaut no. 1 properties)

Concentration of oxide manganese ores from the Steelville and Susie Q claims, Beaver County, Utah

Concentration of oxide manganese ores from the vicinity of Cleveland, Bannock County, Idaho

Concentration of oxide and silicate manganese ores from Siskiyou and Mendocino Counties, Northern California

Beneficiation of oxide manganese ores from Arapahoe, Douglas, Saguache, Custer, Chaffee, and Park Counties, Colorado


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