@book{277594,
	author = {United States.},
	title = {Seguro social, beneficios de sobrevivientes.},
	publisher = {Social Security Administration},
	series = {SSA publication ;},
	address = {[Baltimore, Md.?] :},
	note = {"ICN 487075."},
	url = {http://purl.access.gpo.gov/GPO/LPS499}
}