Singh Dhaliwal, T., and J. L. Serapión. “PROGRESS IN GUAVA SELECTION IN PUERTO RICO”. The Journal of Agriculture of the University of Puerto Rico 65, no. 1 (January 1, 1981): 73–74. Accessed November 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/7566.