Urailuck Leeruang และ Somchai pengprecha. (2012) Purification of biodiesel by adsorption with activated low silica bentonite. Chulalongkorn University:ม.ป.ท.Urailuck Leeruang และ Somchai pengprecha. 2012. Purification of biodiesel by adsorption with activated low silica bentonite. ม.ป.ท.:Chulalongkorn University;Urailuck Leeruang และ Somchai pengprecha. Purification of biodiesel by adsorption with activated low silica bentonite. ม.ป.ท.:Chulalongkorn University, 2012. Print.