@article{ref1,
title="Details of calculating and estimating harmful influences and impairments and their causes on the world scale",
journal="Zeitschrift fur die Gesamte Hygiene und Ihre Grenzgebiete",
year="1981",
author="Renker, K.",
volume="27",
number="4",
pages="258-270",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0049-8610",
doi="",
url="http://dx.doi.org/"
}