E.I. du Pont de Nemours & Company, R. & H. Chemicals Department records, 2624. Manuscripts and Archives.
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E.I. du Pont de Nemours & Company, R. & H. Chemicals Department records, 2624. Manuscripts and Archives. https://findingaids.hagley.org/repositories/3/resources/1169 Accessed December 27, 2024.