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Amchem Products, Inc. records, 1925-1986 (inclusive)

Held at: Wissahickon Valley Historical Society [Contact Us]

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Caesar A. Grasselli Collection, 1948

Held at: Science History Institute Archives [Contact Us]

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Photographs from the Records & Ephemera of Hercules Incorporated, 1912-2007 (inclusive) 1940s-1970s (bulk)

Held at: Science History Institute Archives [Contact Us]