Was White first? Read more about Was White first? Author R. G. Willson Article Date November 30 1975 Journal Title Arizona
Separation marks; notes on "The Worst Rapid" in the Grand Canyon Read more about Separation marks; notes on "The Worst Rapid" in the Grand Canyon Author O. D. Marston Article Date Spring 1976 Journal Title J Ariz Hist
Powell's canyon run Read more about Powell's canyon run Author R. G. Willson Article Date November 23, 1975 Journal Title Arizona