KLAPPER, Gilbert. Late Silurian and Early Devonian Graptolite, Brachiopod and Coral Faunas from Northwestern and Arctic Canada. Geoscience Canada, [S. l.], v. 6, n. 4, 1979. Disponível em: https://journals.lib.unb.ca/index.php/GC/article/view/3193. Acesso em: 3 may. 2024.