@article{ref1,
title="Marihuana. Folklore and science",
journal="Nederlands Tijdschrift voor Geneeskunde",
year="1971",
author="van Praag, H. M.",
volume="115",
number="7",
pages="270-276",
abstract="<p>[Abstract unavailable]</p><p>Language: nl</p>",
language="nl",
issn="0028-2162",
doi="",
url="http://dx.doi.org/"
}