Silva, Servando, José Vicente-Chandler, and Fernando Abruña. “Field Losses of Coffee and Improved Harvesting Methods for Intensively Managed Plantations”. The Journal of Agriculture of the University of Puerto Rico 53, no. 4 (October 1, 1969): 268–273. Accessed March 28, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/11142.