@book{50,
	author = {Stanney, Kay M.},
	title = {Handbook of virtual environments :},
	publisher = {Lawrence Erlbaum Associates,},
	year = {c2002.},
	address = {Mahwah, NJ :},
	url = {http://www.loc.gov/catdir/enhancements/fy0643/2001040284-d.html}
}