@book{192718,
	author = {Goddard Space Flight Center},
	title = {Constellation X-Ray Observatory},
	publisher = {National Aeronautics and Space Administration, Goddard Space Flight Center},
	year = {[2004]},
	address = {[Greenbelt, Md.]},
	note = {Cover title.},
	url = {http://purl.access.gpo.gov/GPO/LPS51326}
}