@article{ref1,
title="Design of cross-sectional surveys using cluster sampling: an overview with Australian case studies",
journal="Australian and New Zealand journal of public health",
year="1999",
author="Carlin, J. B. and Hocking, J.",
volume="23",
number="5",
pages="546-551",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1326-0200",
doi="",
url="http://dx.doi.org/"
}