@article{ref1,
title="Report of committee on highway guard: tests and studies, 1924-1941",
journal="Highway Research Board proceedings",
year="1941",
author="Rahn, G.a.",
volume="",
number="",
pages="-",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0096-1027",
doi="",
url="http://dx.doi.org/"
}