Search U.S. government technical reports digitized or harvested by TRAIL.
Splint coals of the Appalachian Region:their occurrence, petrography, and comparison of chemical and physical properties with associated bright coals
Hydrogenation and liquefaction of coal.
Investigation of Coal Deposits in the Fairview and Coal City Basins of Coosa Field, St. Clair County, Alabama: Reserves, Petrography, and Chemical Properties of Coals; Washability Characteristics of Coal from Fairview Bew; and Geology of Area