@article{ref1,
title="Mouth protection in contact sports",
journal="Medical bulletin of the U. S. Army, Europe",
year="1955",
author="Merchant, H. W. and Warren, R. W.",
volume="12",
number="2",
pages="53-55",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="",
doi="",
url="http://dx.doi.org/"
}