@article{ref1,
title="Trend analyses of four large-scale surveys of high school drug use 1977-1986",
journal="Journal of drug education",
year="1988",
author="Pascale, P. J. and Sylvester, J.",
volume="18",
number="3",
pages="221-233",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0047-2379",
doi="",
url="http://dx.doi.org/"
}