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Facsimile of the 1864 Map of Explorations and Surveys in New Mexico and Utah made under the direction of the Secretary of War by Capt. J. N. Macomb, Topographical Engineers, assisted by C. H. Dimmock, C. Engineer, by Friedrich W. von Egloffstein. 1864.
Special thanks to The National Trails–Intermountain Region of the National Park Service for funding the development of this map.