@article{ref1,
title="Air medical accident rates: a historical look back at causes",
journal="Journal of air medical transport",
year="1991",
author="Collett, H. M.",
volume="10",
number="2",
pages="14-15",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1046-9095",
doi="",
url="http://dx.doi.org/"
}