Corrales-Pérez, Daniel, and Francisco Martín-Romero. 2018. “Modifications to Improve the Application of Method D3987-85 in the Extraction of EPT from the Abandoned Mine Tailings El Fraile, Guerrero, México”. Revista Mexicana De Ciencias Geológicas 35 (1):1-17. https://doi.org/10.22201/cgeo.20072902e.2018.1.536.