Willams, S. Henry. « An Arenig Graptolite from Bell Island, Eastern Newfoundland - Its Biostratigraphic and Paleogeographic Significance ». Atlantic Geoscience 26, no. 1 (mars 1, 1990). Consulté le septembre 27, 2024. https://journals.lib.unb.ca/index.php/ag/article/view/1692.