Report of the International Conference on the Perinatal and Infant Mortality Problem of the United States / under the sponsorship of the National Center for Health Statistics, Public Health Service, U.S. Department of Health, Education, and Welfare.

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Report of the International Conference on the Perinatal and Infant Mortality Problem of the United States / under the sponsorship of the National Center for Health Statistics, Public Health Service, U.S. Department of Health, Education, and Welfare. Public Domain Mark. Source: Wellcome Collection.