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Mine Safety and Health Act : hearings before a subcommittee of the Committee on Government Operations, House of Representatives, Ninety-seventh Congress, second session, February 18 and 19, 1982
- "Mine Safety and Health Act : hearings before a subcommittee of the Committee on Government Operations, House of Representatives, Ninety-seventh Congress, second session, February 18 and 19, 1982"@en
- "Mine Safety and Health Act hearing before a subcommittee of the Committee on Government Operations, House of Representatives, Ninety-seventh Congress, second session, February 18 and 19, 1982"@en
- "Mine Safety and Health Act : hearing before a subcommittee of the Committee on Government Operations, House of Representatives, Ninety-seventh Congress, second session, February 18 and 19, 1982"@en