Velez-Santiago, J., J. A. Arroyo-Aguilu, and S. Torres-Rivera. “Yield, Crude Protein, and Chemical Composition of Five Napier Grass Cultivars on the Northwestern Coastal Plains of Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 67, no. 2 (April 1, 1983): 70-78. Accessed January 27, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/7695.