@article{ref1,
title="On mental hygiene of recreation of 10 to 14-year-old children",
journal="Arztliche Jugendkunde",
year="1965",
author="Geissler, A.",
volume="56",
number="1",
pages="34-39",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0001-9518",
doi="",
url="http://dx.doi.org/"
}