@article{ref1,
title="National survey of trauma registries--United States, 1987",
journal="MMWR: Morbidity and mortality weekly report",
year="1989",
author="Centers for Disease Control and Prevention, USA, ",
volume="38",
number="49",
pages="857-859",
abstract="Abstract unavailable.",
language="en",
issn="0149-2195",
doi="",
url="http://dx.doi.org/"
}