The route of James O. Pattie on the Colorado in 1826 Author A.L.Kroeber Article Date Summer 1964 Journal Title Arizona and the West
Stone's Ferry: old letters describe Colorado River crossing by Mormon pioneers in 1877 Author C.Ferguson Article Date Winter 1974 Journal Title Plateau
Separation marks; notes on "The Worst Rapid" in the Grand Canyon Author O.D.Marston Article Date Spring 1976 Journal Title J Ariz Hist