@article{ref1,
title="Attenuation characteristics of recreational helmets",
journal="Annals of otology, rhinology, and laryngology",
year="1974",
author="Bess, F. H. and Gale, D. W. and Aarni, J. D. and Redfield, N. P.",
volume="83",
number="1",
pages="119-124",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-4894",
doi="",
url="http://dx.doi.org/"
}