Kogbara, Reginald B. 2008. “Ranking Agro-Technical Methods and Environmental Parameters in the Biodegradation of Petroleum-Contaminated Soils in Nigeria”. Electronic Journal of Biotechnology 11 (1). Valparaíso, Chile:0-0. https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v11n1-4.