Search U.S. government technical reports digitized or harvested by TRAIL.
Washability studies of the Clark and Gholson coal beds at Boothton, Ala.
A combination cleaning and dewatering process for treating fine sizes of coal :preliminary report
Recent developments in combination cleaning and dewatering of fine sizes of coal
Laboratory evaluation of vacuum flotation for cleaning coal fines
Washability study of the Pratt bed at the Davidson mine, Graysville, Ala.
Report of Bureau of Mines research and technologic work on coal and related investigations, 1955
Laboratory and Full-Scale Sulfur Elimination Tests on Coal from Pratt Bed, Alabama
Methods for producing dimension stone, Crab Orchard Stone Co., Inc., Cumberland County, Tenn.
Crushed limestone operations, Watauga quarry, Watauga Stone Co., Carter County, Tenn.