@techreport{Plewis2004,
author = {Plewis, I. and Calderwood, L. and Hawkes, D. and Hughes, G. and Joshi, H.},
title= {Millennium cohort study: Technical report on sampling},
year = {2004},
publisher = {Institute of Education, University of London},
address = {London},
number = {Technical report 16},
}