@inbook{Beets1996,
author = {Beets, G.},
title= {Does the Increasing Age at First Birth Lead to Increases in Involuntary Childlessness?},
year = {1996},
editor = {Aeep, Eaps, Iussp, and Vieps},
booktitle = {Evolution or Revolution in European Population. European Population Conference 1995},
address = {Milan},
publisher = {FrancoAngeli},
pages = {15--29},
series = {Volume II},
}