Cite
MLA Citation
Frederick A. Sundberg. “Phylogenetic Analysis of the Spiny Oryctocephalids (Trilobita, Corynexochida?, Oryctocephalidae), Cambrian.” Journal of paleontology, vol. 88, 2014, pp. 556–587. http://access.bl.uk/ark:/81055/vdc_100056538496.0x000049