Tipnapa Wongsalee และ Bunjerd Jongsomjit. (2005) Characteristics and catalytic properties of cobalt catalyst over titania supports. Chulalongkorn University:ม.ป.ท.Tipnapa Wongsalee และ Bunjerd Jongsomjit. 2005. Characteristics and catalytic properties of cobalt catalyst over titania supports. ม.ป.ท.:Chulalongkorn University;Tipnapa Wongsalee และ Bunjerd Jongsomjit. Characteristics and catalytic properties of cobalt catalyst over titania supports. ม.ป.ท.:Chulalongkorn University, 2005. Print.