@article{ref1,
title="F. B. I. Figures on Crime Frequencies",
journal="Journal of criminal law and criminology (1931-1951)",
year="1942",
author="",
volume="32",
number="6",
pages="649-650",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0885-2731",
doi="",
url="http://dx.doi.org/"
}