@article{ref1,
title="Snowmobiling with associated maxillofacial injuries",
journal="Minnesota medicine",
year="1973",
author="Karleen, C. I.",
volume="56",
number="11",
pages="975-979",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0026-556X",
doi="",
url="http://dx.doi.org/"
}