@article{ref1,
title="School bus safety: focus on the danger zone",
journal="Journal of school health",
year="1987",
author="Kerr, D. L.",
volume="57",
number="6",
pages="237-239",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-4391",
doi="",
url="http://dx.doi.org/"
}