@article{ref1,
title="Survey of adolescent drug use. IV. Patterns of drug use",
journal="American journal of public health",
year="1974",
author="Weitman, M. and Scheble, R. O. and Johnson, K. G.",
volume="64",
number="5",
pages="417-421",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}