@article{ref1,
title="Letter: Mobility for the disabled",
journal="British medical journal: BMJ",
year="1975",
author="Campbell, D. A.",
volume="4",
number="5989",
pages="167-167",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}