Description
Item Description:Title from title screen (viewed on Mar. 10, 2008).
"December 1997."
Electronic resource.
Physical Description:2 unnumbered pages : digital, PDF file.
Format:Mode of access: Internet from the CDC web site. Address as of 03/10/08: http://www.cdc.gov/niosh/mining/pubs/pdfs/tn468.pdf ; current access available via PURL.