山西省3490例孕产妇孕期保健服务利用情况调查

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李春王苓王越

Investigation of the situation of the utilization of maternal health care services in 3490 women in Shanxi province

LI Chun，WANG Ling，WANG Yue

中国计划生育学杂志 . 2022, (5): 1000 .