@article{ref1,
title="Levels of carbon monoxide recorded on aircraft flight decks",
journal="Aerospace medicine",
year="1971",
author="Judd, H. J.",
volume="42",
number="3",
pages="344-348",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}