@article{ref1,
title="How specific are the early predictors of teenage drug use?",
journal="NIDA research monograph",
year="1983",
author="Kellam, S. G. and Stevenson, D. L. and Rubin, B. R.",
volume="43",
number="",
pages="329-334",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}