@article{ref1,
title="Hashish and marihuana. A review",
journal="Naturwissenschaften",
year="1974",
author="Herha, J.",
volume="61",
number="2",
pages="70-74",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0028-1042",
doi="",
url="http://dx.doi.org/"
}