FRITZ, W. H.; AITKEN, J. D.; MCILREATH, I. A.; LUDVIGSEN, R. "The Burgess Shale:" Not in the Shadow of the Cathedral Escarpment. Geoscience Canada, [S. l.], v. 17, n. 2, 1990. Disponível em: https://journals.lib.unb.ca/index.php/GC/article/view/3661. Acesso em: 25 dec. 2024.