@article{ref1,
title="Safe operation of ambulances",
journal="Emergency medical services",
year="1975",
author="Lewis, F. J.",
volume="4",
number="5",
pages="51-62, 96",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0094-6575",
doi="",
url="http://dx.doi.org/"
}