@article{ref1,
title="Cannabis. A toxic and dangerous substance. A study of eighty takers",
journal="British journal of addiction to alcohol and other drugs",
year="1966",
author="Chapple, P. A.",
volume="61",
number="3",
pages="269-282",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-0890",
doi="",
url="http://dx.doi.org/"
}