Pérez Olvera, Ma. Antonia. “Concentration of Pb, Cd, Ni, and Zn in Polluted Soils and Their Transference to Broccoli Heads”. REVISTA TERRA LATINOAMERICANA 26, no. 3 (September 1, 2008): 215–225. Accessed November 9, 2024. https://mail.terralatinoamericana.org.mx/index.php/terra/article/view/1345.