@article{ref1,
title="Trauma systems: Pennsylvania's progress and challenge",
journal="Pennsylvania medicine",
year="1980",
author="Moerkirk, G. E. and Grottenthaler, J.",
volume="83",
number="9",
pages="27-32",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-4595",
doi="",
url="http://dx.doi.org/"
}