Powell, John Wesley, 1834-1902 The exploration of the Colorado River. [electronic resource] / Abridged from the 1st ed. of 1875. With an introd. by Wallace Stegner.. — [Chicago] : University of Chicago Press,, 1973, c1957.. — 137 p. : illus. 23 cm. - Phoenix books ; P553. .
"Based on the [Smithsonian Institution] text ... which appeared under the full title: Exploration of the Colorado River of the West and its tributaries." "A Phoenix book."