Concept
Hearing Aids - history
Catalogue
- Books
Antique hearing devices / Elisabeth Bennion.
Bennion, Elisabeth.Date: [1994], ©1994- Books
The New York League for the Hard of Hearing in the context of the Progressive (1900-1918) and the Neo-Progressive (1960-1975) eras / Rose Ann Palmer.
Palmer, Rose Ann.Date: 1997- Books
Die Hand am Ohr : eine kleine Geschichte der Hörhilfen / Rainer Hüls.
Hüls, Rainer, 1947-Date: 2009