저출산ㆍ고령사회 대응 국제비교 공동연구 - 동아시아 초저출산 현상의 장기화: 결혼과 출산 생애의 변화 = An International Collaborative Study of Responses to Low Fertility and Population Aging - Long-Term Trends of Lowest-Low Fertility in East Asia: Transition in Marital and Fertility Behavior
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