Acevedo, G., M. A. Lugo-López, and J. Ortiz-Vélez. “Occurrence of Soil Tumors Northeast of the Guánica Lagoon, Lajas Valley, P.R”. The Journal of Agriculture of the University of Puerto Rico 43, no. 2 (April 1, 1959): 103–115. Accessed April 25, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12548.