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—: Provisional statistics births, marriages, divorces, and deaths for 1968. Monthly Vital Statistics Report, U. S. Dept. of H. E. W., Vol. 17, No. 12, March 12, 1969.
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—: Provisional statistics births, marriages, divorces, and deaths for November 1969. Monthly Vital Statistics Report, U. S. Dept. of H. E. W., Vol. 18, No. 11, January 29, 1970.