Alkhatib, Ahed J, Murtala Muhammad, Ishaq Y Habib, Idris M Idris, Auwal Adamu, and Sani S Bala. “ENVIRONMENTAL ASSESSMENT OF COBALT AT WUDIL, KANO STATE NIGERIA”. European Scientific Journal, ESJ 10, no. 21 (July 30, 2014). Accessed April 20, 2024. https://eujournal.org/index.php/esj/article/view/3842.