by Sereno Watson ; aided by Daniel C. Eaton, and others
Government Printing Office
1871
Professinal papers of the Engineer Department, U.S. Army
no. 18 . Report of the geological exploration of the fortieth parallel / made by order of the Secretary of War according to Acts of Congress of March 2, 1867, and March 3, 1869 ; under the direction of Brig. and Bvt. major Gerneral A.A. Humphreys, chief of engineers, by Clarence King ; v. 5
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