@article{ref1,
title="Assault on Columbine. EMS amid the chaos of our nation's most violent school incident",
journal="JEMS: a journal of emergency medical services",
year="1999",
author="Heightman, A. J.",
volume="24",
number="9",
pages="32-40, 42",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0197-2510",
doi="",
url="http://dx.doi.org/"
}