@article{ref1,
title="A planning-oriented measure of crime and delinquency",
journal="Journal of criminal justice",
year="1973",
author="Nanus, Burt and Perry, Luther",
volume="1",
number="3",
pages="259-263",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0047-2352",
doi="10.1016/0047-2352(73)90065-2",
url="http://dx.doi.org/10.1016/0047-2352(73)90065-2"
}