Orawan Suttichit. (1995) Biodegradation of crude oil by freshwater microorganisms. Mahidol University,:ม.ป.ท.Orawan Suttichit. 1995. Biodegradation of crude oil by freshwater microorganisms. ม.ป.ท.:Mahidol University,;Orawan Suttichit. Biodegradation of crude oil by freshwater microorganisms. ม.ป.ท.:Mahidol University, 1995. Print.