@article{ref1,
title="Type, extent and qualifications of professional personnel assisting the safety engineer",
journal="Zentralblatt fur Arbeitsmedizin und Arbeitsschutz",
year="1975",
author="Quarch, U.",
volume="25",
number="8",
pages="241-244",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-4049",
doi="",
url="http://dx.doi.org/"
}