Hickson, C.J.; Ulmi, M. (2006-01-03). "Volcanoes of Canada"(PDF). Natural Resources Canada. Archived from the original(PDF) on 2006-05-28. Retrieved 2007-01-10.
Hickson, C.J.; Ulmi, M. (2006-01-03). "Volcanoes of Canada"(PDF). Natural Resources Canada. Archived from the original(PDF) on 2006-05-28. Retrieved 2007-01-10.