Martin, Franklin W., Eugenio Cabanillas, and Rubén Guadalupe. “Selected Varieties of Dioscorea Alata L., the Asian Greater Yam”. The Journal of Agriculture of the University of Puerto Rico 59, no. 3 (July 1, 1975): 165–181. Accessed November 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/10604.