@article{ref1,
title="Age of onset of drug use as a factor in drug and other disorders",
journal="NIDA research monograph",
year="1985",
author="Robins, L. N. and Przybeck, T. R.",
volume="56",
number="",
pages="178-192",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}