@article{ref1,
title="Studies on the perception of acoustic signals under noise-protection conditions in track-packing work, and corresponding conclusions",
journal="Zentralblatt fur Arbeitsmedizin und Arbeitsschutz",
year="1974",
author="Jungsbluth, K. and Meisel, R.",
volume="24",
number="5",
pages="153-156",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-4049",
doi="",
url="http://dx.doi.org/"
}