@book{220896,
	author = {NASA Glenn Research Center.},
	title = {NASA's Hall thruster program},
	publisher = {National Aeronautics and Space Administration, Glenn Research Center},
	address = {Cleveland, Ohio},
	note = {Description based on: 2001; title from title screen (viewed May 2, 2006)},
	url = {http://purl.access.gpo.gov/GPO/LPS69440}
}