@article{ref1,
title="Polydrug and alcohol use",
journal="Alcohol, drugs and driving",
year="1985",
author="Walsh, J. Michael",
volume="1",
number="1-2",
pages="115-119",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0891-7086",
doi="",
url="http://dx.doi.org/"
}