@article{ref1,
title="Towards a methodology of traffic safety measurement and program evaluation",
journal="Accident analysis and prevention",
year="1971",
author="Katz, A.",
volume="3",
number="1",
pages="15-43",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0001-4575",
doi="",
url="http://dx.doi.org/"
}