Jirasak Augsornkarn และ Piya Chotickai. (2014) The effect of calcium hydroxide on the strength of fly ash geopolymer paste. Kasetsart University:ม.ป.ท.Jirasak Augsornkarn และ Piya Chotickai. 2014. The effect of calcium hydroxide on the strength of fly ash geopolymer paste. ม.ป.ท.:Kasetsart University;Jirasak Augsornkarn และ Piya Chotickai. The effect of calcium hydroxide on the strength of fly ash geopolymer paste. ม.ป.ท.:Kasetsart University, 2014. Print.