Onwualu-John JN, Offodile OP. Geochemical Assessment of some water Resources in Obio Akpor and Port Harcourt, Niger Delta Basin, Nigeria. EJAS [Internet]. 2022Feb.4 [cited 2024Nov.24];10(1):298-312. Available from: http://116.203.177.230/index.php/AIVP/article/view/11505