Abruña, Fernando, José Vicente-Chandler, Servando Silva, and William Gracia. “Productivity of Nine Coffee Varieties Growing under Intensive Management in Full Sunlight and Partial Shade in the Coffee Region of Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 49, no. 2 (January 20, 2022): 244–253. Accessed November 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/13023.