Pozo, Wilson, Teófile Sanfeliu, and Gloria Carrera. “Heavy Metals in Rice Wetlands in the Lower Basin of the Guayas River”. Maskana 2, no. 1 (June 24, 2011): 17–30. Accessed April 30, 2024. https://publicaciones.ucuenca.edu.ec/ojs/index.php/maskana/article/view/373.