STITT, James H. Trilobites of the Upper Cambrian Sunwaptan Stage, Southern Canadian Rocky Mountains, Alberta. Geoscience Canada, [S. l.], v. 15, n. 1, 1988. Disponível em: https://journals.lib.unb.ca/index.php/GC/article/view/3532. Acesso em: 6 may. 2024.