Retallack, Gregory J. “Internal Structure of Cambrian Vendobionts Arumberia, Hallidaya, and Noffkarkys Preserved by Clay in Montana, USA”. Journal of Palaeosciences 71, no. 1 (July 22, 2022): 1–18. Accessed May 20, 2024. https://jpsonline.co.in/index.php/jop/article/view/539.