Kannida Kunakornporamut. (2000) Post-retention changes in class II extraction cases. Mahidol University,:ม.ป.ท.Kannida Kunakornporamut. 2000. Post-retention changes in class II extraction cases. ม.ป.ท.:Mahidol University,;Kannida Kunakornporamut. Post-retention changes in class II extraction cases. ม.ป.ท.:Mahidol University, 2000. Print.