CAMACHO SOTO, Hernán. Octane, lead and pollution. Tropical Journal of Environmental Sciences, [S. l.], v. 1, n. 1, p. 11–16, 1980. DOI: 10.15359/rca.1-1.1. Disponível em: https://www.revistas.una.ac.cr/index.php/ambientales/article/view/13151.. Acesso em: 17 aug. 2024.