Pornpimon Wangsri. (2005) Chemical substances and hazardous materials database for sofety officers in the electrical industrial group. Mahidol University,:ม.ป.ท.Pornpimon Wangsri. 2005. Chemical substances and hazardous materials database for sofety officers in the electrical industrial group. ม.ป.ท.:Mahidol University,;Pornpimon Wangsri. Chemical substances and hazardous materials database for sofety officers in the electrical industrial group. ม.ป.ท.:Mahidol University, 2005. Print.