“EXTRACTION OF PRECIOUS METALS FROM WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT AS EMPLOYMENT GENERATING ACTIVITY” (2019) Journal of Science and Research: Revista Ciencia e Investigación, 4(CIEIS2019), pp. 34–50. Available at: https://revistas.utb.edu.ec/index.php/sr/article/view/782 (Accessed: 22 September 2026).