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Birth Rates for U.S. Teenagers Reach Historic Lows for All Age and Ethnic Groups
Brady E. Hamilton
出版
U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics
, 2012
URL
http://books.google.com.hk/books?id=yAkF3i78PkgC&hl=&source=gbs_api
EBook
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