@article{ref1,
title="Description of drug users in treatment: 1971-1972 DARP admissions",
journal="American journal of drug and alcohol abuse encompassing all addictive disorders",
year="1975",
author="Simpson, D. D. and Curtis, B. and Butler, M. C.",
volume="2",
number="1",
pages="15-28",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0095-2990",
doi="",
url="http://dx.doi.org/"
}