@article{ref1,
title="Internally - Illuminated Traffic Signs",
journal="Traffic quarterly",
year="1956",
author="Neu, RJ",
volume="10",
number="2",
pages="247-247",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0041-0713",
doi="",
url="http://dx.doi.org/"
}