Powell, J. W. (1957). The exploration of the Colorado River (Abridged from the 1st ed. of 1875. With an introd. by Wallace Stegner.). University of Chicago Press.

Powell, John Wesley. The Exploration of the Colorado River. Abridged from the 1st ed. of 1875. With an introd. by Wallace Stegner. [Chicago]: University of Chicago Press, 1957.

Powell, John Wesley. The Exploration of the Colorado River. Abridged from the 1st ed. of 1875. With an introd. by Wallace Stegner. University of Chicago Press, 1957.