TY  - BOOK
AU  - Hersh, Marion A
AU  - Johnson, Michael A
TI  - Assistive technology for the hearing-impaired, deaf and deafblind
SN  - 9781852333829
U1  - 617.89 HER 
PY  - 2003///
CY  - New York
PB  - Springer
KW  - Communication devices for people with disabilities
ER  -