Introduction, in Pewe, T.L., and Updike, R.G., Guidebook to the Geology of the San Francisco Peaks, Arizona, prepared for Friends of the Pleistocene, Rocky Mountain Section, 15th Field Conference, October 2-4, 1970

Pewe, T.L., 1970, Introduction, in Pewe, T.L., and Updike, R.G., Guidebook to the Geology of the San Francisco Peaks, Arizona, prepared for Friends of the Pleistocene, Rocky Mountain Section, 15th Field Conference, October 2-4, 1970: Plateau, v. 43, no. 2, p. 45-49.