Sotomayor-Ríos, A. “Performance of Twelve Corn Hybrids and Selections in Three Consecutive Crops on the Same Site in the Same Year”. The Journal of Agriculture of the University of Puerto Rico 63, no. 2 (April 1, 1979): 170–179. Accessed November 30, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/10273.