@inbook{4f5f5608836c46b7bb43eb1bcd8378ed,
title = "Demografische ontwikkelingen in de wereld, Europa en Nederland",
author = "{de Beer}, J.A.A. and G.C.N. Beets",
note = "Reporting year: 2012",
year = "2012",
language = "Niet gedefinieerd",
volume = "86",
series = "NIDI boek",
publisher = "Amsterdam University Press",
pages = "25--38",
editor = "{van Nimwegen}, N. and {van Praag}, C.",
booktitle = "Bevolkingsvraagstukken in Nederland anno 2012. Actief ouder worden in Nederland",
address = "Nederland",
}