@book{35545,
	author = {United States. and Johnson, James F.},
	title = {Training in industrial plants.},
	publisher = {Govt. Print. Off.,},
	year = {1919.},
	series = {Training bulletin,},
	address = {Washington,},
	note = {At head of title: U.S. Department of Labor. United States Training Service, C.T. Clayton, director.}
}