O. O. Okoyomon, H. A. Kadir, Z. U. Zango, U. Saidu, and S. A. Nura, “PHYSICOCHEMICAL COMPOSITION AND HEAVY METAL DETERMINATION OF SELECTED INDUSTRIAL EFFLUENTS OF IBADAN CITY, NIGERIA”, OJER, vol. 2, no. 2, pp. 58 - 66, Oct. 2021.