Chong, Joaquín, José A. Dumas, Victor Snyder, and Alberto Beale. “CHEMICAL AND PHYSICAL PROPERTIES OF TWO HIGHLY WEATHERED SOILS MIXED WITH COMPOST”. The Journal of Agriculture of the University of Puerto Rico 97, no. 1-2 (April 1, 2013): 81–86. Accessed August 17, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/3041.