@book{6961,
	author = {Bell, Robert J. T.},
	title = {An elementary treatise on coordinate geometry of three dimensions / },
	publisher = {Macmillan,},
	year = {c1944, printing 1960},
	address = {London :},
	edition = {3rd ed.},
	url = {http://catalog.hathitrust.org/api/volumes/oclc/1178918.html}
}