Mattison, David. “BIRRELL, Benjamin Baltzly: Photographs & Journals of an Expedition Through British Columbia, 1871; HARMON, Great Days in the Canadian Rockies: The Photographs of Byron Harmon”. Archivaria 9 (January 1, 1979): 245-248. Accessed April 25, 2024. https://archivaria.ca/index.php/archivaria/article/view/12580.