“Pomacea Canaliculata (Lamarck, 1828) As Bioindicator of the Presence of Cadmium in the Rivers Guayas, Daule and Babahoyo”. 2016. Revista Científica Ciencias Naturales Y Ambientales 10 (1): 10. https://doi.org/10.53591/cna.v10i1.247.