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Technology and use of lignite proceedings : Bureau of Mines-University of North Dakota Symposium, Grand Forks, N. Dak., April 1961
Low-temperature carbonization of lignite and subbituminous coal :effect of hydrogen atmosphere to 1,000 pounds pressure
Technology and use of lignite :proceedings : Bureau of Mines-University of North Dakota Symposium, Grand Forks, N. Dak., April -May 1963
Technology and use of lignite.Proceedings: Bureau of Mines-University of North Dakota Symposium, Grand Forks, N. Dak., April 29-30, 1965
Technology and use of lignite :proceedings, Bureau of Mines - University of North Dakota Symposium, Grand Forks, N. Dak., April 27-28, 1967
Analysis of the northern Great Plains province lignites and their ash :a study of variability