@article{ref1,
title="An intervention into the relationship between coal workers' pneumoconiosis and dust exposure in U.S. coal miners",
journal="Journal of safety research",
year="1993",
author="Morring, K and Attfield, MD",
volume="24",
number="2",
pages="126-126",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0022-4375",
doi="",
url="http://dx.doi.org/"
}