@article{ref1,
title="The effectiveness of an emphasis patrol by the Illinois State Highway Police",
journal="Traffic safety research review",
year="1961",
author="Henry, JT and Florio, A. E. and Payne, J. L. and Huffman, W. J.",
volume="5",
number="1",
pages="17-31",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0564-0741",
doi="",
url="http://dx.doi.org/"
}