Search U.S. government technical reports digitized or harvested by TRAIL.
Technology and use of lignite :proceedings: Bureau of Mines-University of North Dakota Symposium, Grand Forks, N. Dak., May 1-2, 1969
Bench-scale carbonization of lignite from the northern Great Plains province :a statistical approach
Technology and use of lignite :proceedings: Bureau of Mines - University of North Dakota Symposium, Bismarck, N. Dak., May 12-13, 1971