Oversight hearings on the Coal Mine Health and Safety Act of 1969 (excluding title IV) ; hearings before the Subcommittee on Labor Standards of the Committee on Education and Labor, House of Representatives, Ninety-fifth Congress, first session ...
United States.Congress.House.Committee on Education and Labor.Subcommittee on Labor Standards.
Washington : U.S. Govt. Print. Off.,
1977.
Hearings held June 7-29, 1977.
Coal mines and mining
Mine sanitation