Pattaraporn Chaiprasert และ Tharapong Vitidsant. (2008) Effects of promoters on biomas gasification using nickel. Chulalongkorn University:ม.ป.ท.Pattaraporn Chaiprasert และ Tharapong Vitidsant. 2008. Effects of promoters on biomas gasification using nickel. ม.ป.ท.:Chulalongkorn University;Pattaraporn Chaiprasert และ Tharapong Vitidsant. Effects of promoters on biomas gasification using nickel. ม.ป.ท.:Chulalongkorn University, 2008. Print.