@article{ref1,
title="Bullet Holes and Chemical Residues in Shooting Cases",
journal="Journal of criminal law and criminology (1931-1951)",
year="1940",
author="Walker, Joseph T.",
volume="31",
number="4",
pages="497-521",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0885-2731",
doi="10.2307/1137588",
url="http://dx.doi.org/10.2307/1137588"
}