@article{ref1,
title="Occupational safety and health guidelines for chemical hazards",
journal="MMWR: Morbidity and mortality weekly report",
year="1990",
author="Centers for Disease Control and Prevention, USA, ",
volume="39",
number="21",
pages="367-368",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0149-2195",
doi="",
url="http://dx.doi.org/"
}