Search U.S. government technical reports digitized or harvested by TRAIL.
Progress reports :metallurgical division.
Manganese investigations :metallurgical division.
Manganese investigations :metallurgical division.
Manganese investigations -metallurgical division.
Manganese investigations -metallurgical division.
Manganese investigations, Metallurgical Division.
Manganese investigations -metallurgical division.
Laboratory beneficiation of disseminated fluorspar ores
Celestite deposits, Brown, Nolan, Fisher, and Coke Counties, Tex.
Ore dressing investigation of oxidized lead ores from Missouri and Illinois
Investigation of the Dempsey zinc-lead mine, Washington County, Mo.
Investigation of ore-dressing methods for barite ores from New Mexico, Missouri, and Arkansas