@article{ref1,
title="An evaluation of the traffic safety impact of provisional licensing",
journal="Journal of safety research",
year="1987",
author="Marsh, WC and Hagge, Robert A.",
volume="18",
number="1",
pages="44-44",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0022-4375",
doi="",
url="http://dx.doi.org/"
}