Search U.S. government technical reports digitized or harvested by TRAIL.
Ochers and Mineral Pigments of the Pacific Northwest : Occurrence, Possible Methods of Preparation, and Testing of Ochers, Siennas, and Colored Clays
Iron Oxide Mineral Pigments of the United States
Occurrence, Properties, and Preparation of Limestone and Chalk for Whiting
Recovery of alumina from submarginal bauxites.