Search U.S. government technical reports digitized or harvested by TRAIL.
Gypsum :its uses and preparation
Barite and barium products.
Selenium and tellurium
Monazite, thorium, and cerium
Caesium, rubidium, and lithium
Quartz and silica.
Umber, sienna, and other brown earth pigments
Platinum
Boron and its compounds
Iron oxide pigments and mortar colors
Mining laws of Bulgaria
Mining laws of Madagascar
Mining laws of Tunisia