Toemthip Poolpak. (2008) Biodegradation of heptachlor and its metabolite by soil microcosms. Mahidol University,:ม.ป.ท.Toemthip Poolpak. 2008. Biodegradation of heptachlor and its metabolite by soil microcosms. ม.ป.ท.:Mahidol University,;Toemthip Poolpak. Biodegradation of heptachlor and its metabolite by soil microcosms. ม.ป.ท.:Mahidol University, 2008. Print.