@article{ref1,
title="A description of road traffic noise by formula",
journal="Zeitschrift fur die Gesamte Hygiene und Ihre Grenzgebiete",
year="1974",
author="Wetzstein, E. and Lange, G.",
volume="20",
number="8",
pages="467-472",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0049-8610",
doi="",
url="http://dx.doi.org/"
}