Hernández-Medina, Ernesto. “THE APPARENT DEGENERATION OF PINEAPPLE SLIPS IN PUERTO RICO”. The Journal of Agriculture of the University of Puerto Rico 36, no. 3 (July 1, 1952): 302–317. Accessed July 1, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/13793.