1. New Pennsylvanian conodonts from Oklahoma
2. Conodonts and fish remains from the Cherokee, Kansas City, and Wabaunsee groups of Missouri and Kansas;Gunnell;Journal of Paleontology,1933
3. Conodont color alteration — an index to organic metamorphism;Epstein;United States Geological Survey Professional Paper,1977
4. Permian conodont biostratigraphy in the Great Basin;Clark;Brigham Young University Geological Studies,1979
5. Early Permian crisis and its bearing on Permo-Triassic conodont taxonomy;Clark;Geologica et Palaeontologica,1972