« Assessment of the Environmental Impact of Fly Ash on the Concentration of  Heavy Metals Around Cement Company of Northern Nigeria ». Lafia Journal of Scientific and Industrial Research 3, no. 1 (novembre 5, 2024): 7–12. Consulté le mai 17, 2026. https://lafiascijournals.org.ng/index.php/ljsir/article/view/370.