@book{56394,
	author = {United States},
	title = {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 ....},
	publisher = {U.S. Govt. Print. Off.},
	year = {1977.},
	address = {Washington},
	note = {Hearings held June 7-29, 1977.}
}