Piriya Pinthong และ Apinya Duangchan. (2009) Co-pyrolysis of rice husk, polyethylene and polypropylene mixtures :. Kasetsart University,:ม.ป.ท.Piriya Pinthong และ Apinya Duangchan. 2009. Co-pyrolysis of rice husk, polyethylene and polypropylene mixtures :. ม.ป.ท.:Kasetsart University,;Piriya Pinthong และ Apinya Duangchan. Co-pyrolysis of rice husk, polyethylene and polypropylene mixtures :. ม.ป.ท.:Kasetsart University, 2009. Print.