@article{ref1,
title="Drug use during and after high school: results of a national longitudinal study",
journal="American journal of public health",
year="1974",
author="Johnston, Lloyd D.",
volume="64",
number="Suppl 12",
pages="29-37",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}