Silva, Servando, José Vicente-Chandler, Fernando Abruña, and José A. Rodríguez. “Effect of Season and Plant Spacing on Yields of Intensively Managed Soybeans Under Tropical Conditions”. The Journal of Agriculture of the University of Puerto Rico 56, no. 4 (October 1, 1972): 365–369. Accessed November 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/10799.