@book{18177,
	author = {Gelfand, Stanley A.,},
	title = {Essentials of audiology /},
	publisher = {Thieme,},
	year = {c2009.},
	address = {New York :},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1002/2008054549-d.html}
}