Jiraphan Charoensinvorakul และ Surachai Pornpakakul. (2006) Purifiction of biodiesel using adsorbents. Chulalongkorn University:ม.ป.ท.Jiraphan Charoensinvorakul และ Surachai Pornpakakul. 2006. Purifiction of biodiesel using adsorbents. ม.ป.ท.:Chulalongkorn University;Jiraphan Charoensinvorakul และ Surachai Pornpakakul. Purifiction of biodiesel using adsorbents. ม.ป.ท.:Chulalongkorn University, 2006. Print.