Search U.S. government technical reports digitized or harvested by TRAIL.
Concentration of carbonate and oxide manganese ores from the vicinity of Tracy, Central California
Concentration of oxide manganese ores from the Havasu Lake District, California and Arizona
Concentration of oxide manganese ore from Sheep Mountain property, Durkee district, Oreg.
Concentration of manganese ores from Lincoln County, Nev.
Concentration of manganese ores from Boulder Dam Recreational Area, Clark County, Nev.
Concentration of manganese ores from Piute and Kane counties, southern Utah