@article{ref1,
title="Establishment of "threshold" CO exposure levels",
journal="Annals of the New York Academy of Sciences",
year="1970",
author="DuBois, A. B.",
volume="174",
number="1",
pages="425-428",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0077-8923",
doi="",
url="http://dx.doi.org/"
}