Volcanic craters of the Pinacate Mountains, Sonora, Mexico, Trip 6, road log, in Heindl, L.A., ed., Southern Arizona Guidebook II, combined with the 2nd annual Arizona Geological Society Digest

Galbraith, F.W., Heindl, L.A., and Sykes, G.G., 1959, Volcanic craters of the Pinacate Mountains, Sonora, Mexico, Trip 6, road log, in Heindl, L.A., ed., Southern Arizona Guidebook II, combined with the 2nd annual Arizona Geological Society Digest: Arizona Geological Society, p. 252-272.