Janya Saiui. (1991) Functional indices for assessment of vitamin A status in rural community. Mahidol University,:ม.ป.ท.Janya Saiui. 1991. Functional indices for assessment of vitamin A status in rural community. ม.ป.ท.:Mahidol University,;Janya Saiui. Functional indices for assessment of vitamin A status in rural community. ม.ป.ท.:Mahidol University, 1991. Print.