@article{ref1,
title="Comprehensive program increases supervisors' knowledge of drug abuse",
journal="Occupational health and safety",
year="1984",
author="Martin, D. W. and Heckel, V. M. and Long, R.",
volume="53",
number="10",
pages="48-53",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0362-4064",
doi="",
url="http://dx.doi.org/"
}