Valdivia, Roberto, Víctor A. Vidal, and Mauro Sierra. “Maize Progenitor Selection to Obtain Hybrid Seeds by Small Farmers”. Agronomía Mesoamericana 11, no. 2 (July 1, 2006): 85–89. Accessed January 20, 2025. https://revistas.ucr.ac.cr/index.php/agromeso/article/view/17317.