@article{ref1,
title="ASHBEAMS (American Society of Hospital Based Emergency Air Medical Services) membership survey",
journal="Hospital aviation",
year="1989",
author="Gills, C. B.",
volume="8",
number="5",
pages="5-10",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0740-8315",
doi="",
url="http://dx.doi.org/"
}