@article{ref1,
title="Analysis of heroin in relation to illicit drug traffic",
journal="American educational research journal",
year="1975",
author="van der Slooten, E. P. and van der Helm, H. J.",
volume="6",
number="1-2",
pages="83-88",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-8312",
doi="",
url="http://dx.doi.org/"
}