Somrit Putthunbut. (2005) Removal of ferric iron from iron-stained kaolinite. Mahidol University,:ม.ป.ท.Somrit Putthunbut. 2005. Removal of ferric iron from iron-stained kaolinite. ม.ป.ท.:Mahidol University,;Somrit Putthunbut. Removal of ferric iron from iron-stained kaolinite. ม.ป.ท.:Mahidol University, 2005. Print.