Stiegler, Christopher David. “Echinacea: Herbal Medicine With a Wild History. Edited by Kelly Kindscher. 2016. Springer International Publishing, Switzerland. 238 Pp.”. Ethnobiology Letters 8, no. 1 (May 31, 2017): 56–57. Accessed September 19, 2024. https://ethnobiologyletters.designtist.ca/index.php/ebl/article/view/911.