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- Author(s):
- Thomas, Charles Hermon, author
- Publication:
- [Philadelphia] : [publisher not identified], [1880]
- Subject(s):
- Hearing Aids
Bone Conduction -- physiology
Deafness -- rehabilitation
Tooth -- physiology
- Author(s):
- Knapp, Herman, 1832-1911, author
- Publication:
- [New York?] : [publisher not identified], [1880?]
- Subject(s):
- Hearing Aids
- Author(s):
- Campbell, James A. (James Alexander), 1847-, author
- Publication:
- Chicago : Duncan Brothers, 1882
- Subject(s):
- Hearing Aids
Hearing -- physiology
- Author(s):
- Maloney, J. A. (James Aloysius), 1846-1897, author
- Publication:
- New York : G.P. Putnam's Sons, printers, [1887?]
- Subject(s):
- Hearing Aids
Deafness -- therapy
Hearing Loss, Bilateral -- therapy
- Author(s):
- Thomas, Charles Hermon, author
- Publication:
- [Philadelphia] : [publisher not identified], [1880]
- Subject(s):
- Hearing Aids
Bone Conduction -- physiology
Deafness -- rehabilitation
Tooth -- physiology