Ubong, Ini. U., and Charles Obunwo. “Petroleum Hydrocarbon Contamination of Soil at a Commercial Trailer Truck Parking Facility at Alesa Eleme, Rivers State, Nigeria”. RA Journal Of Applied Research 4, no. 03 (March 14, 2018): 1482–1493. Accessed April 20, 2024. http://www.rajournals.in/index.php/rajar/article/view/88.