@article{ref1,
title="Leisure time structuring and leisure-time parks from the medical viewpoint",
journal="Offentliche Gesundheitswesen",
year="1970",
author="Langmann, R.",
volume="32",
number="11",
pages="610-617",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0029-8573",
doi="",
url="http://dx.doi.org/"
}