Samuels, George, Ernesto Hernández, and Santiago Torres. “RESPONSE OF PLANTAINS TO MAGNESIUM FERTILIZER IN AN ULTISOL”. The Journal of Agriculture of the University of Puerto Rico 59, no. 3 (July 1, 1975): 233–235. Accessed April 24, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/10612.