Natt Dumkum และผู้แต่งคนอื่นๆ. (2008) Physical and chemical characteristics of cement produced with different ratio of Zn, Cr, and Ni in pilot-scale rotary cement kiln. Chulalongkorn University:ม.ป.ท.Natt Dumkum และผู้แต่งคนอื่นๆ. 2008. Physical and chemical characteristics of cement produced with different ratio of Zn, Cr, and Ni in pilot-scale rotary cement kiln. ม.ป.ท.:Chulalongkorn University;Natt Dumkum และผู้แต่งคนอื่นๆ. Physical and chemical characteristics of cement produced with different ratio of Zn, Cr, and Ni in pilot-scale rotary cement kiln. ม.ป.ท.:Chulalongkorn University, 2008. Print.