Financial operations (companies and organizations)
Cables, feeders, and other exterior elements
Chemicals, chemical products, and chemical processes
Cylinder record and duplicating technology
[NA029-F] Notebook Series -- Notebooks by Edison
https://edisondigital.rutgers.edu/document/NA029AAA
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Archive.org Viewer, Microfilm Series Reel 99