@article{ref1,
title="Respirable coal mine dust standards and their enforcement under the Federal Coal Mine Health and Safety Act of 1969",
journal="Inhaled particles",
year="1970",
author="Schlick, D. P.",
volume="2",
number="",
pages="1007-1013",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0301-1577",
doi="",
url="http://dx.doi.org/"
}