Map of Southwestern Colorado
Insets: Railroad systems reaching Durango [from Denver, Salt Lake City, Albuquerque, and Phoenix] -- Plat of Needle Mountain mines -- Plat of Durango and surroundings -- Plat of mines at La Plata Mountains, California Mining District -- Plat of San Juan Co., Utah. Available also through the Library of Congress Web site as a raster image. Includes land districts, Indian reservations, railroads, irrigation canals,...
Report on the geology and resources of the Black Hills of Dakota : with atlas
Geology of the Black Hills of Dakota | Mineral resouraces of the Black Hills of Dakota
At head of title: Department of the Interior. U.S. geographical and geological survey of the Rocky Mountain region. J.W. Powell in charge. Atlas has special t.p.: Topographical and geological atlas of the Black Hills ... to accompany the report of Henry Newton ... New York, J. Bien, 1879. Contains Henry Newton's writing: Geology of the Black Hills of Dakota, and Walter P. Jenney's Mineral...
Geographical and Geological Survey of the Rocky Mountain Region (U.S.) - Newton, Henry - Jenney, Walter Proctor