@article{ref1,
title="Zip Guns and Crude Conversions: Identifying Characteristics and Problems",
journal="Journal of criminal law, criminology and police science",
year="1969",
author="Koffler, BB",
volume="60",
number="4",
pages="520-531",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0022-0205",
doi="",
url="http://dx.doi.org/"
}