@inbook{Federkeil1997,
author = {Federkeil, G.},
title= {The Federal Republic of Germany: Polarization of family structure},
year = {1997},
editor = {Kaufmann, F.-X.},
editor = {Kuijsten, A.},
editor = {Schulze, H.-J.},
editor = {Strohmeier, K.-P.},
booktitle = {Family life and family policies in Europe, Volume I: Structure and trends in the 1980s},
address = {Oxford},
publisher = {Clarendon},
pages = {77--113},
}