@book{35938,
	author = {United States.},
	title = {Productivity of labor in merchant blast furnaces ...},
	publisher = {U.S. Govt. print. off.,},
	year = {1929.},
	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.}
}