http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Atmospheric monitoring systems operator's training guide
U.S. Department of Labor, Mine Safety and Health Administration, National Mine Health and Safety Academy.
Title from title screen (viewed on Mar. 16, 2009).
Mode of access: Internet from MSHA web site. Address as of 3/16/09: http://www.msha.gov/beltair/AMSTrainingGuide.pdf ; current access available via PURL.