[NP021B], Technical Note, Thomas Alva Edison, March 4th, 1886
https://edisondigital.rutgers.edu/document/NP021B
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Title
[NP021B], Technical Note, Thomas Alva Edison, March 4th, 1886
Editor's Notes
"Deaf" notes and drawings related to hearing aid devices
Author
Date
1886-03-04
Type
Folder/Volume ID
NP021-F
Microfilm ID
44:157
Document ID
NP021B
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University