Search U.S. government technical reports digitized or harvested by TRAIL.
Progress reports - metallurgical division.
Progress reports - Metallurgical Division.
Manganese investigations -metallurgical division.
Pilot-plant investigations :production of sponge iron with producer gas
Recovery of cobalt from manganese ores in the production of electrolytic manganese.
Pilot-plant investigations :matte smelting of Chamberlain, S. Dak., Manganese ore