DB I, IJ O, YL M, MO W. Comparative Effects of Bone Char and NPK Agricultural Fertilizers on Hydrocarbon Utilizing Bacteria and Fungi in Crude Oil Polluted Soil. ASRJETS-Journal. 2019;55(1):35-49. Accessed September 20, 2025. https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/4792