“The Determination of Cadmium Levels in Corn Grains (Zea Mays L.) from the Ecuadorian Coast and Mountains”. Revista Científica Ciencias Naturales y Ambientales 12, no. 2 (December 20, 2018). Accessed December 5, 2025. https://revistas.ug.edu.ec/index.php/cna/article/view/1649.