Ash, S.R., 1976, Preliminary report on the floral zones in the upper Triassic Chinle Formation, southwestern United States [abs.]: Geological Society of America Abstracts with Programs, v. 8, no. 5, p. 562-563.
Ash, S.R., 1974, Notes on the Chinle Formation (upper Triassic) in east-central Arizona, in Ash, S.R., ed., Guidebook to Devonian, Permian and Triassic plant localities, east-central Arizona: Botanical Society of America, Paleobotanical Section, p. 40-42.
Armstrong, A.K., and Mamet, B.L., 1978, Mississippian paleotectonics and biostratigraphy, New Mexico and adjacent southeastern Arizona [abs.]: Geological Society of America Abstracts with Programs, v. 10, no. 3, p. 94.