phonepaseuth Sitthiphan และ Nita viwattanatipa. (2013) Relationship between facial proportion, six maxillary anterior teeth ratio and gender in laotian population. Mahidol University:ม.ป.ท.phonepaseuth Sitthiphan และ Nita viwattanatipa. 2013. Relationship between facial proportion, six maxillary anterior teeth ratio and gender in laotian population. ม.ป.ท.:Mahidol University;phonepaseuth Sitthiphan และ Nita viwattanatipa. Relationship between facial proportion, six maxillary anterior teeth ratio and gender in laotian population. ม.ป.ท.:Mahidol University, 2013. Print.