Exploration of the Colorado River in 1869 and 1871-1872William Darrah, William Culp Darrah, Ralph V. Chamberlin, Charles KellyHäftad189 kr
Exploration of the Colorado River and the High Plateaus of Utah by the Second Powell Expedition of 1871-1872Herbert Gregory, Ralph Chamberlin, Charles Kelly, Herbert E. Gregory, William Culp DarrahHäftad269 kr