09/00/1926 [Supplied year and month] Edison, Thomas Alva to Hunter, Charles Francis [supplied or conjectured]
Testing and quality control; Chemicals, chemical products, and chemical processes
[CM10]  Special Collections Series -- Chemical Production Records -- Edison Chemical Works: C. F. Hunter Papers (1914-1926)
[CM10CI; TAEM 281:693]
Courtesy of Thomas Edison National Historical Park.
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