@book{211532,
	author = {Library of Congress.},
	title = {MARC 21 format for authority data},
	publisher = {Library of Congress, Cataloging Distribution Service},
	year = {1999-},
	address = {Washington},
	edition = {1999 ed.},
	note = {Second publisher varies: National Library of Canada, 1999-2003.},
	url = {http://purl.access.gpo.gov/GPO/LPS4283}
}