@book{91, author = {Braida, Louis D. and American Speech-Language-Hearing Association}, title = {Hearing aids}, publisher = {: American Speech-Language-Hearing Assn.,}, year = {1979}, address = {Rockville, Md.}, url = {http://electronicjournals.nal.gov.au/ASHA%20Monographs%20%281-30%29/1979,%20%20ASHA%20Monograph%2019,%20%20Braida%20Durlach%20Lippmann%20et%20al..pdf} }