http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Minerals, health, and safety in-house research, development, and demonstration in fiscal year 1980
Division of Minerals Health and Safety Technology.
by Staff, Division of Minerals Health and Safety Technology.
Information circular (United States. Bureau of Mines) ; 8817
Publications Distribution Branch, 4800 Forbes Ave., Pittsburgh, PA 15213