@article{ref1,
title="Playground-related injuries in preschool-aged children--United States, 1983-1987",
journal="MMWR: Morbidity and mortality weekly report",
year="1988",
author="Centers for Disease Control and Prevention, USA, ",
volume="37",
number="41",
pages="629-632",
abstract="Abstract unavailable.",
language="en",
issn="0149-2195",
doi="",
url="http://dx.doi.org/"
}