Lucas, S.G., Heckert, A.B., Estep, J.W., and Anderson, O.J., 1997, Stratigraphy of the upper Triassic Chinle Group, Four Corners region, in Anderson, O., Kues, B., and Lucas, S., eds., Mesozoic geology and paleontology of the Four Corners area: New Mexico Geological Society 48th Field Conference Guidebook, p. 81-108.
