Phansiri Soodjit และ Penjkt Srinophakun. (2014) Synthesis of biodiesel catalyzed by rare earth solid catalyst. kasetsart University:ม.ป.ท.Phansiri Soodjit และ Penjkt Srinophakun. 2014. Synthesis of biodiesel catalyzed by rare earth solid catalyst. ม.ป.ท.:kasetsart University;Phansiri Soodjit และ Penjkt Srinophakun. Synthesis of biodiesel catalyzed by rare earth solid catalyst. ม.ป.ท.:kasetsart University, 2014. Print.