@book{43258,
	author = {United States},
	title = {Federal metal and nonmetallic mine safety act (oversight).},
	publisher = {U.S. Govt. Print. Off.},
	year = {1972.},
	address = {Washington},
	note = {Hearings held May 15-18 in Washington, D.C., and July 31, 1972 in Kellogg, Idaho.}
}