Mesa Verde and the Four Corners
William Henry and William H. Holmes Jackson
Comments: ill. ;
"At head of title: Hayden Survey, 1874-1876.
Reprint (1st work). Originally published: Ancient ruins in southwestern Colorado / by W.H. Jackson. In Annual report of the United States Geological and Geographical Survey of the Territories ... for the year 1874. Washington : G.P.O., 1876.
Reprint (2nd work). Originally published: Report on the ancient ruins of southwestern Colorado, examined during the summers of 1875 and 1876. In Tenth annual report of the United States Geological and Geographical survey of the Territories ... for the year 1876. Washington : G.P.O., 1878."