@article{ref1,
title="School and recreation in the life of a city child",
journal="Deutsche Medizinische Wochenschrift",
year="1955",
author="Hellbrugge, T. and Rutenfranz, J.",
volume="80",
number="52",
pages="1909-1911",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0012-0472",
doi="",
url="http://dx.doi.org/"
}