北京地区青少年恒牙先天数目异常的分析

续美如,霍益亮,吕冰峰

An analysis of congenitally anomaly of namber of permanent teeth in Beijing adolescents

XU Mei-ru; HUO Yi-liang; L¨U Bing-feng

人类学学报 . 2003, (02): 145 -149 .