Barría, Cristian, Richard Mudarra, and Reggie Guerra. “Zinc Oxide Supplementation As a Substitute to Antibiotics in Pigs (Sus Scrofa Domestica)”. Agronomía Mesoamericana 35 (January 9, 2024): 54643. Accessed December 2, 2024. https://revistas.ucr.ac.cr/index.php/agromeso/article/view/54643.