@article{ref1,
title="Drug and alcohol attitudes and usage among elementary and secondary students",
journal="Journal of safety research",
year="1990",
author="Martin, G. L. and McCrary, JS and Robertson, ED and Estes, RE and Fournet, GP",
volume="21",
number="4",
pages="168-168",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0022-4375",
doi="",
url="http://dx.doi.org/"
}