The Discovery of Yellowstone National Park 1870 (Copy 3)Langford, Nathaniel Pitt
125 pp. Paperback. Near Fine Condition. The complete story of the Washburn Expedition to the headquarters of the Yellowstone and Firehole Rivers in the year 1870. One of the principal sources of information on the exploration of the Yellowstone region and its establishment. University of Nebraska Press, 1972. Sixth Printing.