Lauritzen Ørnulf, and Yochelson Ellis L. “Salterella Rugosa (Early Cambrian: Agmata) on Nordaustlandet and Spitsbergen, Svalbard”. Polar Research 1982, no. 1 (January 7, 1982): 5-10. Accessed April 24, 2024. https://polarresearch.net/index.php/polar/article/view/2570.