Geology and utilization of Fort Union lignitesRobert B. Finkelman, Susan J. Tewalt, Daniel J. Daly · First published 1992Open the Tome
Estimation of lignite resources in the Wilcox Group of central and east Texas using the National Coal Resources Data SystemSusan J. Tewalt · First published 1991Open the Tome
Analyses of lignites and associated rocks from the Fort Union region, North Dakota and MontanaSusan J Tewalt · First published 1989Open the Tome
