Some observations concerning the value of the audiphone

Some observations concerning the value of the audiphone

Collection:
Medicine in the Americas, 1610-1920
Author(s):
Knapp, Herman, 1832-1911 author
Publication:
[New York?] : [publisher not identified], [1880?]
Language(s):
English
Format:
Text
Subject(s):
Hearing Aids
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)
Extent:
9 pages
Illustrations:
Illustrations
NLM Unique ID:
101684573 (See catalog record)
OCLC no.:
953229727
Permanent Link:
http://resource.nlm.nih.gov/101684573