@inbook{Ryder1983,
author = {Ryder, N.B. },
title= {Cohort and period measures of changing fertility},
year = {1983},
editor = {Bulatao, R.A.},
editor = {Lee, R.D.},
editor = {National Research Council (U.S.), Committee on Population and Demography, Panel on Fertility Determinants},
booktitle = {Determinants of Fertility in Developing Countries},
address = {New York},
publisher = {Academic Press},
pages = {737--756},
}