Bartlett, M.W., North, R.M., Preece, R.K., Childers, R.L., Schleiss, W.A.Ring, J.A., and Dreier, J.E., 1994, Trip 18: Safford District (Sanchez) and Morenci - Metcalf, October, 1994 - Bootprints Along the Cordillera, Porphyry Copper Deposits from Alaska to Chile: Arizona Geological Society Field Trip Guidebook, [39] p.
