@book{280558,
	author = {United States.},
	title = {United States Government Printing Office type book :},
	publisher = {United States Government Printing Office,},
	year = {1931.},
	address = {Washington :},
	edition = {[Loose-leaf edition].},
	note = {"April 1931"--Cover.},
	url = {https://purl.fdlp.gov/GPO/gpo117534}
}