@article{ref1,
title="Marijuana use among adults",
journal="Psychiatry interpersonal and biological processes",
year="1970",
author="McGlothlin, W. H. and Arnold, D. O. and Rowan, P. K.",
volume="33",
number="4",
pages="433-443",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0033-2747",
doi="",
url="http://dx.doi.org/"
}