10/01/1920 Edison, Thomas Alva to Miller, John Vincent and Hunter, Charles Francis
(Chesler, Isidor (Jerry)) Labor; Tools and machinery; Testing and quality control; Metals and minerals; Electric battery; Chemicals, chemical products, and chemical processes [Photocopy]
[X501A]  Alvin J. Salkind Collection: Notes by Thomas A. Edison
[X501A08A; TAEM 0:0]
Courtesy of Alvin J. Salkind.