http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Injury experience in sand and gravel mining
U.S. Department of Labor, Mine Safety and Health Administration.
Some v. distributed to depository libraries in microfiche.
Informational report (United States. Mine Safety and Health Administration)
Injury experience in the sand and gravel industry
Information report (United States. Mine Safety and Health Administration)