@article{ref1,
title="Agricultural tractor accidents: A description of 14 tractor accicents and a comparison with road traffic accidents",
journal="British medical journal: BMJ",
year="1965",
author="Rees, W. D.",
volume="5453",
number="5453",
pages="63-66",
abstract="Abstract unavailable.",
language="",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}