Holmes, William Henry,; Hayden, F. V.; Dutton, Clarence E.; Langley, S. P.; Powell, John Wesley,; Geological and Geographical Survey of the Territories (U.S.)
Holmes, William Henry,; Hayden, F. V.; Dutton, Clarence E.; Langley, S. P.; Powell, John Wesley,; Geological and Geographical Survey of the Territories (U.S.)