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Karl D. Jessen papers, 1872-1980 (inclusive) 1890-1917 (bulk)
Held at: Bryn Mawr College [Contact Us]
Held at: Bryn Mawr College [Contact Us]
Held at: Historical Society of Pennsylvania [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]