@article{ref1,
title="Oregon study of advisory letters: The effectiveness of warning letters in driver in driver improvement",
journal="Traffic safety research review",
year="1967",
author="Syring, EM and Warmoth, EJ and Kaestner, N",
volume="11",
number="3",
pages="67-72",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0564-0741",
doi="",
url="http://dx.doi.org/"
}