Steele, H.J., Kiersch, G.A., Clark, O.M., Jr., Wilson, E.D., and Harshbarger, J.W., 1952, Stratigraphy, structure, and economic geology typical of southern Arizona; Trip 5, road log, first day--Sunday, April 13, 1952, in Shride, A.F., McKee, E.D., and Harshbarger, J.W., eds., Guidebook for field trip excursions in southern Arizona, Geological Society of America, Cordilleran Section Meeting, April 10-14, 1952, Tucson, Arizona: Arizona Geological Society, p. 62-80.
