HOPSON, Clifford A.; MELSON, William G. Compositional Trends and Eruptive Cycles at Mount St. Helens. Geoscience Canada, [S. l.], v. 17, n. 3, 1990. Disponível em: https://journals.lib.unb.ca/index.php/GC/article/view/3665. Acesso em: 24 nov. 2024.