Giácoman Vallejos, Germán, Irma Lizárraga Castro, Emanuel Hernández Núñez, and María del Carmen Ponce Caballero. 2017. “PRESENCE OF PESTICIDES IN THE KARSTIC AQUIFER BETWEEN THE MUNICIPALITIES OF MÉRIDA TO PROGRESO, YUCATÁN, MÉXICO”. Centro Azúcar Journal 44 (3):13. http://centroazucar.uclv.edu.cu/index.php/centro_azucar/article/view/105.