Hickson, C. J. and Peterson, D. W. (1990) “Special Symposium Commemorating the 10th Anniversary of the Eruption of Mount St. Helens, May 18, 1980”, Geoscience Canada, 17(3). Available at: https://journals.lib.unb.ca/index.php/GC/article/view/3663 (Accessed: 5 May 2024).