Roongsiri Kamtrakul. (1988) Effects of dietary fat and B-carotene from green leafy vegetable supplementation on vitamin A nutrition in preschool children. Mahidol University,:ม.ป.ท.Roongsiri Kamtrakul. 1988. Effects of dietary fat and B-carotene from green leafy vegetable supplementation on vitamin A nutrition in preschool children. ม.ป.ท.:Mahidol University,;Roongsiri Kamtrakul. Effects of dietary fat and B-carotene from green leafy vegetable supplementation on vitamin A nutrition in preschool children. ม.ป.ท.:Mahidol University, 1988. Print.