@inbook{Michael1975,
author = {Michael, R.T. and Willis, R.J.},
title= {Contraception and fertility: Household production under uncertainty},
year = {1975},
editor = {Terleckyj, N.E.},
booktitle = {Household production and consumption},
address = {New York},
publisher = {Columbia University Press},
pages = {27--93},
}