EI EI MON และ Chavalek Vanichavetin. (2011) Effect of Myanmar volcanic ash on portland cement concrete pavement. Kasetsart University:ม.ป.ท.EI EI MON และ Chavalek Vanichavetin. 2011. Effect of Myanmar volcanic ash on portland cement concrete pavement. ม.ป.ท.:Kasetsart University;EI EI MON และ Chavalek Vanichavetin. Effect of Myanmar volcanic ash on portland cement concrete pavement. ม.ป.ท.:Kasetsart University, 2011. Print.