Wimolnan Kanket. (2006) Properties of the clay fraction of alfisols and ultisols in Thailand /. Kasetsart University,:ม.ป.ท.Wimolnan Kanket. 2006. Properties of the clay fraction of alfisols and ultisols in Thailand /. ม.ป.ท.:Kasetsart University,;Wimolnan Kanket. Properties of the clay fraction of alfisols and ultisols in Thailand /. ม.ป.ท.:Kasetsart University, 2006. Print.