Ancient landscapes of the Grand Canyon region; the geology of Grand Canyon, Zion, Bryce, Petrified Forest, and Painted Desert

McKee, E.D., 1931, Ancient landscapes of the Grand Canyon region; the geology of Grand Canyon, Zion, Bryce, Petrified Forest, and Painted Desert: Edwin D. McKee [privately published], 50 p. [Later editions - Flagstaff, Northland Press].