@article{ref1,
title="Cannabis use amongst British university students. I. Prevalence rates and differences between students who have tried cannabis and those who have never tried it",
journal="British journal of addiction to alcohol and other drugs",
year="1974",
author="Kosviner, A. and Hawks, D. and Webb, M. G.",
volume="69",
number="1",
pages="35-60",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-0890",
doi="",
url="http://dx.doi.org/"
}