ProQuest U.S. Congressional Hearings Digital Collection.
v, 301 pages ; cm
Considers legislation to increase Federal authority to enforce coal mining safety regulations. Considers (81) S. 1031.
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Print version: United States. Congress. Senate. Committee on Labor and Public Welfare. Mine Safety. Microfiche version: United States. Congress. Senate. Committee on Labor and Public Welfare. Mine Safety. [Bethesda, Md.] : LexisNexis Academic & Library Solutions,