@book{De Graaf2004,
author = {De Graaf, N.D. and Graaf, P.M. de and Kraaykamp, G. and Ultee, W.},
title= {Family Survey Dutch Population 2003},
year = {2004},
doi = {10.17026/dans-xm2-5fue},
address = {The Hague},
publisher = {DANS},
}