@book{35825,
	author = {United States.},
	title = {Hours and earnings in anthracite and bituminous coal mining, 1922 and 1924 ...},
	publisher = {Govt. print. off.,},
	year = {1926.},
	series = {Bulletin of the United States Bureau of labor statistics,},
	address = {Washington,},
	note = {At head of title:  U.S. Department of labor.  James J. Davis, secretary.  Bureau of labor statistics.  Ethelbert Stewart, commissioner.}
}