Baird, M.R., and Collinson, J.W., 1975, Conodont biostratigraphy of the Kaibab and Plympton Formations [abs.]: Geological Society of America Abstracts with Programs, v. 7, p. 716.
Baird, M.R., and Collinson, J.W.
Geological Society of America Abstracts with Programs, v. 7, p. 716.
Stratigraphy, Biostratigraphy, Conodont, [Kaibab Fm][Kaibab Limestone] - Permian, (Aubrey Group),