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Plank family papers, circa 1820s-1980s
Held at: Tri-County Heritage Society [Contact Us]
Held at: Tri-County Heritage Society [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: Science History Institute Archives [Contact Us]
Held at: The Historical and Interpretive Collections of The Franklin Institute [Contact Us]
Held at: Princeton University Library: Manuscripts Division [Contact Us]
Held at: Princeton University Library: Manuscripts Division [Contact Us]