@article{ref1,
title="Drug impairment reviews: opiates, minor tranquilizers",
journal="NIDA research monograph",
year="1977",
author="Mason, M. F.",
volume="Series 11",
number="",
pages="44-60",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}