1Onsachi, J.M., 2Dibal, H. U, 3Daku, S.S. “The Maiganga Coal Mine Drainage and Its Effects on Water Quality, North Eastern Nigeria”. International Journal of Emerging Trends in Science and Technology, Vol. 3, no. 07, July 2016, pp. 324-4333, https://igmpublication.org/ijetst.in/index.php/ijetst/article/view/1146.