Pathompong Pangamol และ Chakrit Sirisinha. (2014) Development of petroleum industry byproduct sulfur to be used in rubber vulcanization. Mahidol University:ม.ป.ท.Pathompong Pangamol และ Chakrit Sirisinha. 2014. Development of petroleum industry byproduct sulfur to be used in rubber vulcanization. ม.ป.ท.:Mahidol University;Pathompong Pangamol และ Chakrit Sirisinha. Development of petroleum industry byproduct sulfur to be used in rubber vulcanization. ม.ป.ท.:Mahidol University, 2014. Print.