@article{ref1,
title="Bridging existing streets",
journal="Highway Research Board bulletin",
year="1950",
author="Kelcey, Guy",
volume="25",
number="",
pages="18-20",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0073-2206",
doi="",
url="http://dx.doi.org/"
}