Songsuda Chancharupong. (1997) Effect of prolonged consumption of yogurt on lactose digestion and tolerance in adolescents. Mahidol University,:ม.ป.ท.Songsuda Chancharupong. 1997. Effect of prolonged consumption of yogurt on lactose digestion and tolerance in adolescents. ม.ป.ท.:Mahidol University,;Songsuda Chancharupong. Effect of prolonged consumption of yogurt on lactose digestion and tolerance in adolescents. ม.ป.ท.:Mahidol University, 1997. Print.