[QX001001], Legal Testimony, Thomas Alva Edison, Empire Limestone Co, Allis-Chalmers Co, September 8th, 1910
[QX001-F] Litigation Series -- Ore Milling Cases
https://edisondigital.rutgers.edu/document/QX001001
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Archive.org Viewer, Microfilm Series Reel 118