http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
hearings, Ninety-third Congress, first session ... October 30, 31, and November 1, 1973
Committee on Interior and Insular Affairs.
Subcommittee on Minerals, Materials, and Fuels.
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National Commission on Materials Policy.
United States. Congress. Senate. Committee on Interior and Insular Affairs. Subcommittee on Minerals, Materials, and Fuels.