Liu, Li C., Miguel Santiago-Córdova, and Agenol González. “Further Evaluation of Herbicides in Yam (Dioscorea sp.)”. The Journal of Agriculture of the University of Puerto Rico 74, no. 3 (July 1, 1990): 221–228. Accessed December 1, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/6654.