@article{ref1,
title="26 u. s. c. section 5861 (d) requires mens rea as to the physical characteristics of the weapon",
journal="Journal of criminal law and criminology",
year="1995",
author="Lefevour, MT",
volume="85",
number="4",
pages="1136-1160",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0091-4169",
doi="",
url="http://dx.doi.org/"
}