Abraham, N.A. , Odokuma, L.O. and Okpokwasilli, G.C. 2021. Toxicity of raw and bio slurry treated oily sludge on Nitrobacter species and Tilapia guineensis. GSC Advanced Research and Reviews. 8, 3 (Sep. 2021), 087–092. DOI:https://doi.org/10.30574/gscarr.2021.8.3.0193.