Vital and health statistics: Series 21, Data from National Vital Statistics System. 6. Weight at birth and cause of death in neonatal period, United States, earlv 1950. statistics derived from vital records on neonatal mortality by age and cause according to weight at birth, by color and sex, for Infants born In United States during first 3 months of 1950: [by Sam Shapiro and Jeanne Unger].

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