@article{ref1,
title="A Classification of the Causes of Crime",
journal="Journal of the American Institute of Criminal Law and Criminology",
year="1921",
author="Woodruff, R",
volume="12",
number="1",
pages="105-109",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0885-4173",
doi="",
url="http://dx.doi.org/"
}