Gregory, H.E., 1932, Itinerary, A, Cedar City to Zion Canyon, Grand Canyon, Bryce Canyon, Cedar Breaks, return to Cedar City, in Gregory, H.E., Colorado Plateau region, International Geologic Congress, 16th, United States, 1933, Guidebook 18--Excursions C-1 and C-2: Washington, D.C., U.S. Government Printing Office, p. 28-34.
