Search U.S. government technical reports digitized or harvested by TRAIL.
Hydrogenation and liquefaction of coal.
Hydrogenation and liquefaction of coal.
Hydrogenation and liquefaction of coal.
Hydrogenation and liquefaction of coal.
Possible hazards attending the use of engines operated on butane fuel in mining and tunneling
Bureau of Mines research on the hydrogenation and liquefaction of coal and lignite