00343nam a22000737a 4500245017300000260007200173300001100245650001300256  aWeight at birth and survival of the newborn :bby geographic divisions and urban and rural areas, United States, early 1950 /cUS Dept. of Health, Education and Welfare  aWashington, DC :bUS Dept. of Health, Education and Welfare,c1965.  a218 p.  aNewborn