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By: Ege, John R. - Leavesley, G. H. - Steele, S. G. (Susan G.) - Weeks, John B. - United States. Bureau of Mines.Edition:Publication info: [Reston, Va.], U.S. Department of the Interior, Geological Survey, 1978Volume:Series:Holding Institution: Bureau of Land ManagementSubjects: Colorado Oil-shales Rio Blanco County Rio Blanco County (Colo.)BHL Collections: