@article{ref1,
title="Publication of NIOSH criteria documents on welding, brazing, and thermal cutting and on radon progeny",
journal="MMWR: Morbidity and mortality weekly report",
year="1988",
author="Centers for Disease Control and Prevention, USA, ",
volume="37",
number="35",
pages="545-547",
abstract="Abstract unavailable.",
language="en",
issn="0149-2195",
doi="",
url="http://dx.doi.org/"
}