References
- Heuser , R. L. 1976 . Fertility tables for birth cohorts by color: United States, 1917–73. , Rockville , MD : National Center for Health Statistics .
- Hobcraft , J. , Menken , J. and Preston , S. 1982 . Age, period, and cohort effects in demography: A review. . Pop. Index , 48 (1) : 4 – 43 .
- U.S. Bureau of the Census . 1989 . Projections of the population of the United States, by age, sex, and race: 1988 to 2080, by Gregory Spencer. , Current Population Reports Series P‐25, No. 1018 Washington, D.C. : Government Printing Office .