@article{ref1,
title="Black-white differences in social background and military drug abuse patterns",
journal="American journal of psychiatry",
year="1974",
author="Nail, R. L. and Gunderson, E. and Arthur, R. J.",
volume="131",
number="10",
pages="1097-1102",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-953X",
doi="",
url="http://dx.doi.org/"
}