@article{ref1,
title="Safety guidelines for handling gases",
journal="Arizona dental journal",
year="1976",
author="",
volume="22",
number="1",
pages="40-40",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0004-1459",
doi="",
url="http://dx.doi.org/"
}