K.Mohammed, M., H. Khudaier, S., kamil Al-Mayaly, I. and A. Salman, S. 2018. Effect of time, temperature and pH on crude oil biodegradation by bacterial isolates from Al- Dora refinery- Baghdad. Al-Qadisiyah Journal of Pure Science. 20, 3 (Jul. 2018), 68 - 80.