Bendezú, Pedro, Anne D. Frame, Edward L. Frame, and Carmelo Bonilla. “Watercress Cultivation Sites and Their Relationship to Fascioliasis in Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 72, no. 3 (July 1, 1988): 405–411. Accessed March 29, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/6869.