Grenville Channel. Preliminary map. 1924. AMS 2.
MLA
of Lands, British Columbia. Dept., and Forests. Grenville Channel. Preliminary Map. 1924. AMS 2. Army Map Service, 1947. https://collections.library.yale.edu/catalog/15536312.
APA, 6th edition
of Lands, B. C. D., & F. (1947). Grenville Channel. Preliminary map. 1924. AMS 2. [Maps]. Army Map Service, https://collections.library.yale.edu/catalog/15536312.