@article{ref1,
title="The incidence of drug use among Halifax adolescents",
journal="British journal of addiction to alcohol and other drugs",
year="1970",
author="Whitehead, P. C.",
volume="65",
number="2",
pages="159-165",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-0890",
doi="",
url="http://dx.doi.org/"
}