Second day, road log from Douglas to Tucson via Bisbee, Tombstone, Charleston, Fort Huachuca and Sonoita, in Callender, J.F., Wilt, J.C., Clemons, R.E., and James, H.L., eds., Land of Cochise, southeastern Arizona

Keith, Stanley B., and Wilt, J.C., 1978, Second day, road log from Douglas to Tucson via Bisbee, Tombstone, Charleston, Fort Huachuca and Sonoita, in Callender, J.F., Wilt, J.C., Clemons, R.E., and James, H.L., eds., Land of Cochise, southeastern Arizona: New Mexico Geological Society 29th Field Conference Guidebook, p. 31-76.