@article{ref1,
title="The role of helmets in reducing head injuries from motorcycle accidents: a political or medical issue?",
journal="Western journal of medicine",
year="1981",
author="Luna, G. K. and Copass, M. K. and Oreskovich, M. R. and Carrico, C. J.",
volume="135",
number="2",
pages="89-92",
abstract="Abstract unavailable.",
language="",
issn="0093-0415",
doi="",
url="http://dx.doi.org/"
}