@article{ref1,
title="Drug contact of students in a secondary school in a large town. Results of a study of secondary school students in the city of Essen",
journal="Zeitschrift für klinische Psychologie und Psychotherapie",
year="1974",
author="Zimmermann, R.",
volume="22",
number="2",
pages="169-179",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0300-869X",
doi="",
url="http://dx.doi.org/"
}