@article{ref1,
title="A study of regional variation in workdays lost through accidents",
journal="Accident analysis and prevention",
year="1971",
author="Harper, DG and Lister, EG and Middleton, M",
volume="3",
number="4",
pages="229-236",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0001-4575",
doi="",
url="http://dx.doi.org/"
}