@article{ref1,
title="Tentative emergency exposure limits for sulphur dioxide, sulphuric acid, chlorine and phosgene",
journal="Annals of occupational hygiene",
year="1970",
author="Zielhuis, R. L.",
volume="13",
number="3",
pages="171-176",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-4878",
doi="",
url="http://dx.doi.org/"
}