Khwannapa Kongsanoa และ Nipaka Sukpirom. (2005) Synthesis and characterization of manganese-iron oxide composites for adsorption of transition metal ions. Chulalongkorn University:ม.ป.ท.Khwannapa Kongsanoa และ Nipaka Sukpirom. 2005. Synthesis and characterization of manganese-iron oxide composites for adsorption of transition metal ions. ม.ป.ท.:Chulalongkorn University;Khwannapa Kongsanoa และ Nipaka Sukpirom. Synthesis and characterization of manganese-iron oxide composites for adsorption of transition metal ions. ม.ป.ท.:Chulalongkorn University, 2005. Print.