@book{4176,
	author = {Hersh, Marion A.,},
	title = {Assistive technology for the hearing-impaired, deaf and deafblind /},
	publisher = {Springer,},
	year = {c2003.},
	address = {London ;},
	url = {http://www.loc.gov/catdir/enhancements/fy0817/2002044538-d.html}
}