Numbere, Aroloye Ofo. “Assessment of Heavy Metal Percolation from Electronic Waste (mobile Phones) through Different Soil Layers in the Niger Delta, Nigeria”. International Journal of Science and Engineering Invention 5, no. 11 (August 7, 2019): 132 to 134. Accessed December 23, 2024. https://ijsei.in/index.php/ijsei/article/view/176.