@article{ref1,
title="Industrial hygiene and work protection",
journal="Pharmazeutische Praxis",
year="1968",
author="Tölke, S.",
volume="6",
number="",
pages="155-157",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0048-3656",
doi="",
url="http://dx.doi.org/"
}