@article{Bras2007,
author = {Bras, H. and Van Tilburg, T.},
title= {Kinship and Social Networks: A Regional Analysis of Sibling Relations in Twentieth-Century Netherlands},
year = {2007},
doi = {10.1177/0363199007300244},
journal = {Journal of Family History},
volume = {32},
number = {3},
pages = {296--322},
}