Hearing aids for the deaf
Subtitle: a lecture delivered under the auspices of the Institute of Physics before the Manchester and District Local Section on 28th June, 1933
By: by T. S. Littler.
Contributors: Institute of Physics (Great Britain)
Publisher: s.n.
Published: 1933
Place of publication: [S.l
Language: eng
Number of pages: 16
Subjects: Hearing aids.
Notes: Cover title.