@article{ref1,
title="Holiday and spare time--a study from the viewpoint of occupational medicine",
journal="Zentralblatt fur Arbeitsmedizin und Arbeitsschutz",
year="1973",
author="Maidorn, K.",
volume="23",
number="8",
pages="229-36 concl",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-4049",
doi="",
url="http://dx.doi.org/"
}