Kanokkarn Skulnee และ Amarawan Intasiri. (2007) Influence of precursors on synthesis and metal sorption properties of Schiff's base doped Silica. Chulalongkorn University:ม.ป.ท.Kanokkarn Skulnee และ Amarawan Intasiri. 2007. Influence of precursors on synthesis and metal sorption properties of Schiff's base doped Silica. ม.ป.ท.:Chulalongkorn University;Kanokkarn Skulnee และ Amarawan Intasiri. Influence of precursors on synthesis and metal sorption properties of Schiff's base doped Silica. ม.ป.ท.:Chulalongkorn University, 2007. Print.