Rattanakorn Na Wittayanan. (2009) The effect of pre-dissolution time to geopolymer properties /. Kasetsart University,:ม.ป.ท.Rattanakorn Na Wittayanan. 2009. The effect of pre-dissolution time to geopolymer properties /. ม.ป.ท.:Kasetsart University,;Rattanakorn Na Wittayanan. The effect of pre-dissolution time to geopolymer properties /. ม.ป.ท.:Kasetsart University, 2009. Print.