DEL AGUILA JUÁREZ, Pedro; 						LUGO DE LA FUENTE, Jorge; 						VACA PAULÍN, Rocío.
 Geoaccumulation Index (Igeo) and Enrichment Factor (EF) for Cd, Cr, Cu, Ni, Pb y Zn in Soils of the Upper Lerma Basin.
<strong>CIENCIA ergo-sum</strong>, [S.l.], v. 12, n. 2, p. 155-161, mar. 2015.
ISSN 2395-8782.
Available at: &lt;<a href="https://cienciaergosum.uaemex.mx/article/view/7536" target="_new">https://cienciaergosum.uaemex.mx/article/view/7536</a>&gt;. Date accessed: 19 oct. 2026.