@article{ref1,
title="Sports problems of the rural population",
journal="Zeitschrift fur Arztliche Fortbildung (Jena)",
year="1961",
author="Ullrich, H.",
volume="55",
number="",
pages="1125-1129",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-2178",
doi="",
url="http://dx.doi.org/"
}