PUCPR Search for 'an:136840'

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 ....

Washington U.S. Govt. Print. Off. 1977 .
iv, 724 p. , Hearings held June 7-29, 1977. 24 cm..

By Hermida, Angel G..
[Río Piedras] [Universidad de Puerto Rico] 1969 .
142 p. 22 cm..

[Washington, D.C.?] The Commission 1980 .
v. , Title from cover. 28 cm..