Caro-Costas, Rubén, Fernando Abruña, and José Vicente-Chandler. “Response to Fertilization of Strip-Cultivated Plantains Growing on a Steep Latosol in the Humid Mountain Region of Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 48, no. 4 (October 1, 1964): 312–317. Accessed April 24, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/13000.