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Fasciola hepatica (common liver fluke). a. Cercaria b. Encysted cercaria
Unknown. 1932. “Fasciola hepatica (common liver fluke). a. Cercaria b. Encysted cercaria.” Special Collections, USDA National Agricultural Library. Accessed November 26, 2022, https://www.nal.usda.gov/exhibits/speccoll/items/show/8077.