@book{De Graaf1998,
author = {De Graaf, N.D. and Graaf, P.M. de and Kraaykamp, G. and Ultee, W.},
title= {Family Survey Dutch Population 1998.},
year = {1998},
doi = {10.17026/dans-zzu-yw93},
address = {The Hague},
publisher = {DANS},
}