@article{ref1,
title="Obstacles to the Development of Research in Crime and Delinquency",
journal="Journal of research in crime and delinquency",
year="1993",
author="Jeffery, C. R.",
volume="30",
number="4",
pages="491-497",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0022-4278",
doi="10.1177/0022427893030004010",
url="http://dx.doi.org/10.1177/0022427893030004010"
}