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全面两孩政策实施前后河北省出生活产数及性别比变化趋势分析
杨荣山, 张英奎, 李进华, 范松丽, 杜立燕, 左利红
中国生育健康杂志 ›› 2019, Vol. 30 ›› Issue (5) : 407-410.
全面两孩政策实施前后河北省出生活产数及性别比变化趋势分析
Secular trends of the number and sex ratio of live births in Hebei Province since the implementation of two-child policy
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