http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
amendments of 1971. Hearings, Ninety-second Congress, first session, on S. 2506 ... September 22, October 1, and December 9, 1971
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United States. Congress. Senate. Committee on Labor and Public Welfare. Subcommittee on the Handicapped.