Nattaporn Prakongkep. (2008) Comparative mineralogy and chemistry of lowland soils in Thailand /. Kasetsart University,:ม.ป.ท.Nattaporn Prakongkep. 2008. Comparative mineralogy and chemistry of lowland soils in Thailand /. ม.ป.ท.:Kasetsart University,;Nattaporn Prakongkep. Comparative mineralogy and chemistry of lowland soils in Thailand /. ม.ป.ท.:Kasetsart University, 2008. Print.