@article{ref1,
title="Data validity barriers to determining magnitude of large truck accident problem",
journal="Transportation quarterly",
year="1993",
author="Bowman, Bradley L. and Hummer, Joseph",
volume="47",
number="1",
pages="39-60",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0278-9434",
doi="",
url="http://dx.doi.org/"
}