@article{ref1,
title="Drug and alcohol use, problems and availability among students in Mexico and Canada",
journal="Bulletin on narcotics",
year="1979",
author="Castro, M. E. and Valencia, M. and Smart, Reginald G.",
volume="31",
number="1",
pages="41-48",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-523X",
doi="",
url="http://dx.doi.org/"
}