@inbook{Keilman2006,
author = {Keilman, N.},
title= {Households and Families},
year = {2006},
editor = {Wunsch, G.},
editor = {Caselli, G.},
editor = {Vallin, J.},
booktitle = {Demography: Analysis and Synthesis},
address = {Amsterdam},
publisher = {Academic Press},
pages = {457--476},
}