Congress report :
Congress report : 3rd International Congress of the Hard of Hearing.
- Zurich : Bund Schweizerischer Schwerhörigen-Vereine, 1989.
- 361 p.
eng fre.
Deafness--congresses.
Hearing disorders--congresses.
WV 270
eng fre.
Deafness--congresses.
Hearing disorders--congresses.
WV 270