Knight, J. Brookes, A. Myra Keen, R. C. Moore, C. M. Yonge, R. L. Batten, Robert Robertson, L. R. Cox, N. H. Ludbrook, E. L. Yochelson, and A. G. Smith. “Part I, Mollusca 1, Complete Volume”. Treatise on Invertebrate Paleontology (January 1, 1960). Accessed November 27, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5587.