Legislative history of the Federal Coal Mine Health and Safety Act of 1969 (Public Law 91-173) as amended through 1974 including black lung amendments of 1972

"Legislative history of the Federal coal mine health and safety act of 1969 (Public Law 91-173) as amended through 1974 including black lung amendments of 1972"
"Legislative history of the Federal Coal Mine Health and Safety Act of 1969 (Public Law 91-173) as amended through 1974 including black lung amendments of 1972"@en
"Legislative history of the Federal coal mine health and safety act of 1969 : (Public law 91-173) as amended through 1974, including blacklung amendments of 1972 : prepared for the Subcommittee on Labor of the Committee on Labor and Public Welfare, United States Senate"@en
"Legislative history of the Federal coal mine health and safety act of 1969 (Public Law 91-173) as amended through 1974 : including black lung amendments of 1972 : prepared for the Subcommittee on Labor of the Committee on Labor and Public Welfare, United States Senate"
"Legislative history of the Federal coal mine health and safety act of 1969 (Public Law 91-173) as amended through 1974 including black lung amendments of 1972 : prepared for the Subcommittee on Labor of the Committee on Labor and Public Welfare, United States Senate"@en
"Legislative history of the Federal coal mine health and safety act of 1969 (Public law 91-173) as amended through 1974, including blacklung amendments of 1972 : prepared for the Subcommittee on Labor of the Committee on Labor and Public Welfare, United States Senate"@en