Kelechukwu, J. O., et al. “ASSESSMENT OF GROUND AND SURFACE WATER QUALITY IN SOME SUB-URBAN AREAS OF OWERRI, IMO STATE”. African Journal of Environment and Sustainable Development, vol. 2, no. 1, Jan. 2024, pp. 23-43, https://www.openjournals.ijaar.org/index.php/ajesd/article/view/395.