@book{36076,
	author = {United States.},
	title = {Wages and hours of labor in metalliferous mines, 1924 and 1931 ...},
	publisher = {U.S. Govt. print. off.,},
	year = {1933.},
	series = {Bulletin of the United States Bureau of labor statistics,},
	address = {Washington,},
	note = {At head of title:  United States Department of labor.  W. N. Doak, secretary.  Bureau of labor statistics.  Charles E. Baldwin, acting commissioner.}
}