Sánchez Gómez, Viviana, David Carrera Villacrés, Paulina Guevara García, and Darío Bolaños Guerrón. “Physical-Chemical Characterization and Capacity of Lead Retention in the Soils of the Experimental Field Yachay”. FIGEMPA: Investigación y Desarrollo 3, no. 1 (June 1, 2017): 56–60. Accessed May 19, 2024. https://revistadigital.uce.edu.ec/index.php/RevFIG/article/view/56.