03/01/1921 Edison, Thomas Alva to Hunter, Charles Francis
(Ryan, Frank T) Chemicals, chemical products, and chemical processes [Marginalia by Ryan, Frank T]
[CM10]  Special Collections Series -- Chemical Production Records -- Edison Chemical Works: C. F. Hunter Papers (1914-1926)
[CM10AI; TAEM 281:610]
Courtesy of Thomas Edison National Historical Park.
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