http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Review of rock dusting practices in underground coal mines
National Institute for Occupational Safety and Health
1 online resource (8 unnumbered pages, 86 pages) : color illustrations.
Includes bibliographical references (pages 42-48).
Information circular (National Institute for Occupational Safety and Health) ; IC 9530