Herrera, Franklin. “Effect of Weed Stubbles and Pre-Emergent Herbicides in the Control of Weeds in Beans”. Agronomía Mesoamericana 11, no. 2 (July 1, 2006): 63–71. Accessed April 20, 2024. https://revistas.ucr.ac.cr/index.php/agromeso/article/view/17311.