@article{ref1,
title="Plant contamination at children's playgrounds (author's transl)",
journal="Offentliche Gesundheitswesen",
year="1973",
author="Krienke, E. G. and Zaminer, A.",
volume="35",
number="8",
pages="458-474",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0029-8573",
doi="",
url="http://dx.doi.org/"
}