On the construction of hearing and speaking instruments
By: by John Bishop
Contributors: Royal College of Surgeons of England
Publisher: Printed by Taylor and Francis
Published: 1856
Place of publication: London
Language: eng
Number of pages: 18
Subjects: Hearing Aids; Speech Acoustics
Notes: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

The Royal College of Surgeons of England.