@article{ref1,
title="Patterns of drug use in a large metropolitan workforce",
journal="NIDA research monograph",
year="1990",
author="Lehman, W. E. and Simpson, D. D.",
volume="100",
number="",
pages="45-62",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}