Onwualu-John JN, Offodile OP. Geochemical Assessment of some water Resources in Obio Akpor and Port Harcourt, Niger Delta Basin, Nigeria. EJAS [Internet]. 2022 Feb. 4 [cited 2026 May 30];10(1):298-312. Available from: https://scholarpublishing.org/journals/index.php/EJAS/article/view/8193