Search U.S. government technical reports digitized or harvested by TRAIL.
Selective flotation concentration of lead-zinc ores from the Musick and Helena mines, Bohemia District, Oreg.
Beneficiation of Sherman pyromorphite lead ore
Beneficiation of ferberite-scheelite ore from Germania Consolidated Mines, Inc. Stevens County, Wash.
Beneficiation of western phosphate ores
Zirconium-hafnium separation