Moore, R. C., B. F. Howell, Donald W. Fisher, W. H. Haas, and F. H. T. Rhodes. “Part W, Miscellanea, Complete Volume”. Treatise on Invertebrate Paleontology (January 1, 1962). Accessed May 4, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5420.