@article{ref1,
title="Research on drugs and the workplace: introduction and summary",
journal="NIDA research monograph",
year="1990",
author="Gust, S. W. and Crouch, D. J. and Walsh, J. Michael",
volume="100",
number="",
pages="3-8",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}