Pérez Escolar, Raúl. “Possible Subterranean Entrance of Ocean Water into the Caño Tiburones Area in Northern Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 61, no. 4 (October 1, 1977): 484–488. Accessed October 20, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/10413.