Turner, Nancy J., and Dawn C. Loewen. “The Original ‘Free Trade’: Exchange of Botanical Products and Associated Plant Knowledge in Northwestern North America”. Anthropologica 40, no. 1 (June 8, 2022): 49–70. Accessed January 23, 2026. https://cas-sca.journals.uvic.ca/index.php/anthropologica/article/view/2071.