@article{ref1,
title="Planned swimming instruction for small children",
journal="Offentliche Gesundheitswesen",
year="1958",
author="Lorenz, K.",
volume="20",
number="3",
pages="101-103",
abstract="unavailable.  Keywords: Drowning; Drowning Prevention; Water Safety",
language="de",
issn="0029-8573",
doi="",
url="http://dx.doi.org/"
}