Seasonal variation of births, United States, 1933-63
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  • Description:
    Seasonal pattern of births in the United States for 1933-63, by color, geographic region, live-birth order, age of mother, and legitimacy status. Changes in pattern over time. International comparisons. Discussion of factors associated with seasonality of births and possible causes. Revised birth rates and fertility rates by month and color. Observed rates adjusted for seasonal variation, based on new populations and new method of seasonal adjustment.
  • Content Notes:
    Public Health Service publication, no. 1000-Ser. 21-no. 9.
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