Azuakemu, Chukwumati, John, and Abam Prince. “Lubricant Automobile Oil: Effect on Chemical and Heavy Metal Status of Soil in Rivers State, South-South, Nigeria”. International Journal of Contemporary Research and Review 14, no. 03 (March 11, 2023): 20231–20237. Accessed November 21, 2024. https://ijcrr.info/index.php/ijcrr/article/view/1003.