@article{ref1,
title="Crack. The nation's emergency",
journal="American journal of nursing",
year="1990",
author="Horrocks, M. A.",
volume="90",
number="4",
pages="42-43",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-936X",
doi="",
url="http://dx.doi.org/"
}