@book{220463,
	author = {International GPS Service for Geodynamics},
	title = {IGS directory},
	address = {Pasadena, Calif},
	note = {Title from caption on web page last update May 25,2002(viewed on MAy 24,2004).},
	url = {http://purl.access.gpo.gov/GPO/LPS49383}
}