@article{ref1,
title="Alcohol and marijuana: concordance of use by men and women",
journal="NIDA research monograph",
year="1986",
author="Mendelson, J. H. and Mello, N. K. and Lex, B. W.",
volume="68",
number="",
pages="117-141",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}