𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Presentation of a simple device for excluding interfering noises from one ear while testing hearing acuity of the other ear.

✍ Scribed by Dr. Horace Newhart


Book ID
115036152
Publisher
John Wiley and Sons
Year
1942
Tongue
English
Weight
52 KB
Volume
52
Category
Article
ISSN
0023-852X

No coin nor oath required. For personal study only.