Ramírez, Oscar D., and J. Vélez-Santiago. “Snap Bean Variety Trials in East-Central Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 46, no. 3 (July 1, 1962): 213–218. Accessed April 16, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12337.