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A Study of Infant Mortality from Linked Records by Age of Mother, Total-birth Order, and Other Variables, United States, 1960 Live-birth Cohort
Helen Mary VavraLinda J. Querec
出版U.S. Department of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics, 1973
URLhttp://books.google.com.hk/books?id=_rO3zpvlsg0C&hl=&source=gbs_api
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