Chulaporn Ramsiri. (1997) Development and validation of modified dietary assessment of vitamin A intake in northern preschool children. Mahidol University,:ม.ป.ท.Chulaporn Ramsiri. 1997. Development and validation of modified dietary assessment of vitamin A intake in northern preschool children. ม.ป.ท.:Mahidol University,;Chulaporn Ramsiri. Development and validation of modified dietary assessment of vitamin A intake in northern preschool children. ม.ป.ท.:Mahidol University, 1997. Print.