Ubaghs G, Rasmussen HW, Meyer DL, Macurda, Jr. DB, Fay RO, Peck RE, et al. Part T, Echinodermata 2, vol. 1-3, Complete Volume. InvertebratePaleo [Internet]. 1978 Jan. 1 [cited 2025 Mar. 30];. Available from: https://journals.ku.edu/InvertebratePaleo/article/view/5651