Vasal, S. K., N. Vergara, and McLean McLean. “Strategies in Developing Tropical Maize Hybrids”. Agronomía Mesoamericana 5 (January 1, 1994): 184–189. Accessed July 17, 2024. https://revistas.ucr.ac.cr/index.php/agromeso/article/view/60515.