@article{ref1,
title="Unsafe playgrounds",
journal="Pediatrics",
year="1979",
author="Reichelderfer, T. E. and Overbach, A. and Greensher, J.",
volume="64",
number="6",
pages="962-963",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-4005",
doi="",
url="http://dx.doi.org/"
}