@book{9663,
	author = {Gray, Jeremy,},
	title = {Ideas of space :},
	publisher = {Clarendon Press ;},
	year = {1989.},
	address = {Oxford :},
	edition = {2nd ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0605/89003012-d.html}
}