Search U.S. government technical reports digitized or harvested by TRAIL.
Use of scrapers and other light earth-moving equipment in bituminous-coal strip mining
Experiment in Underground Gasification of Coal, Gorgas, Alabama
Minable Reserves, Petrography, Chemical Characteristics, and Washability Tests of Coal Occurring in the Coos Bay Coal Field, Coos County, Oregon
Reserves, Petrographic and Chemical Characteristics, and Carbonizing, Properties of Coal Occurring South of Dry Fork of Minnesota Creek, Gunnison County, Near Paonia, Colorado, and the Geology of the Area