@article{ref1,
title="Two new instruments for the measurement of "class" characteristics of fired bullets",
journal="Journal of criminal law and criminology (1931-1951)",
year="1936",
author="Wilson, Charles M.",
volume="27",
number="1",
pages="97-107",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0885-2731",
doi="10.2307/1134861",
url="http://dx.doi.org/10.2307/1134861"
}