Rodríguez-García, José, Fernando Abruña, and Heber Irizarry. “Spraying for Leaf Spot and Liming Increase Yam (Dioscorea Alata L.) Yield”. The Journal of Agriculture of the University of Puerto Rico 67, no. 3 (July 1, 1983): 286–292. Accessed July 18, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/7721.