St. Louis, D. G., J. A. Arroyo-Aguilú, A. Ramírez-Ortiz, and R. E. McDowell. “Yield and Nutritive Value of Sorghum, Maize and Soybean Forages Harvested in Southwestern Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 63, no. 3 (July 1, 1979): 400–411. Accessed December 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/10299.