@inbook{Oppong1983,
author = {Oppong, C.},
title= {Women’s roles, opportunity costs, and fertility},
year = {1983},
editor = {Bulatao, R.A.},
editor = {Lee, R.D.},
booktitle = {Determinants of fertility in developing countries},
address = {New York},
publisher = {Academic Press},
pages = {547--589},
}