ELIAS, Robert; YOUNG, Graham. Ordovician-Silurian Boundary Interval in the Williston Basin Outcrop Belt of Manitoba: A Record of Global and Regional Environmental and Biotic Change. Geoscience Canada, [S. l.], v. 39, n. 4, 2013. Disponível em: https://journals.lib.unb.ca/index.php/GC/article/view/20019. Acesso em: 27 apr. 2024.