Wilai Yankirati. (1993) Study on the utilization of lactose in Thai adults consuming yogurt and milk. Mahidol University,:ม.ป.ท.Wilai Yankirati. 1993. Study on the utilization of lactose in Thai adults consuming yogurt and milk. ม.ป.ท.:Mahidol University,;Wilai Yankirati. Study on the utilization of lactose in Thai adults consuming yogurt and milk. ม.ป.ท.:Mahidol University, 1993. Print.