@inbook{Van der Erf1984,
author = {Van der Erf, R.F.},
title= {Internal migration in the Netherlands: measurement and main characteristics},
year = {1984},
editor = {Ter Heide, H.},
editor = {Willekens, F.J.},
booktitle = {Demographic Research and Spatial Policy: The Dutch Experience},
address = {London},
publisher = {Academic Press},
pages = {47--68},
}