[QP037186], Legal Testimony, Jonas Walter Aylsworth, March 18th, 1907
Cellulose, resins, rubber, and related products
Cylinder record and duplicating technology
[QP037-F] Legal Series -- Legal Department Records -- Phonograph -- Case Files
https://edisondigital.rutgers.edu/document/QP037186
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Archive.org Viewer, Microfilm Series Reel 225