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200 10$aTrends in teenage childbearing, United States, 1970-81 : an analytical review of recent trends and differentials in childbearing by teenagers
210   $cU.S. Department of Health and Human Services, Public Health Service, National Center for Health Statistics$aHyattsville, Md
517   $aTrends in teenage childbearing, United States, 1970-81 
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996   $aTrends in teenage childbearing, United States, 1970-81 : an analytical review of recent trends and differentials in childbearing by teenagers$93322920
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