Exploration of the Colorado River of the West and its tributaries [microform] : explored in 1869, 1870, 1871, and 1872, under the direction of the secretary of the Smithsonian institution.
Smithsonian Institution.
Washington : Govt. print. off.,
1875.
Map and profile in pocket.
J.W. Powell in charge.
The present report does not include a narrative of the second descent of the river in 1871-1872, a detailed account of which may be found in F.S. Dellenbaugh's A conyon voyage, New York, 1908.
Chapters 1-9 of pt. 1, with six chapters added, were published later (Meadville, Pa., 1895) under title: Canyons of the Colorado, by J.W. Powell ...
Sabin Group 117.
Microfiche.