@article{ref1,
title="Firefighters' occupational exposure to carbon monoxide",
journal="Journal of Occupational Medicine",
year="1974",
author="Sammons, J. H. and Coleman, R. L.",
volume="16",
number="8",
pages="543-546",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0096-1736",
doi="",
url="http://dx.doi.org/"
}