@article{ref1,
title="Underground coal mine injuries",
journal="Journal of the Kentucky Medical Association",
year="1973",
author="Zimmerman, J. B.",
volume="71",
number="1",
pages="31-37",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0023-0294",
doi="",
url="http://dx.doi.org/"
}