北京市海淀区部分幼儿园36~42月龄儿童龋齿流行趋势及牙面分布的抽样调查
북경시해정구부분유인완36~42월령인동우치류행추세급아면분포적추양조사
Prevalence and tooth surface distribution of caries in 36~42-month-old Children in Haidian district of Beijing
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