Description
Item Description:Title from title screen (viewed on Apr. 8, 2008).
"August 2006."
"This document is based on collaborative work under a Cooperative Research and Development Agreement (CRADA NIO-00-002) between NIOSH and Twentymile Coal Co."-P. [4].
Electronic resource.
Physical Description:52 unnumbered pages : digital, PDF file.
Format:Mode of access: Internet from the CDC web site. Address as of 04/08/08: http://www.cdc.gov/niosh/mining/pubs/pdfs/2006-135.pdf ; current access available via PURL.
Bibliography:Includes bibliographical references (page [48]).