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Constantine Hering and Calvin B. Knerr family papers, 1820-1940 (bulk) 1820-2003 (inclusive)
Held at: Drexel University: College of Medicine Legacy Center [Contact Us]
Held at: Drexel University: College of Medicine Legacy Center [Contact Us]
Held at: Bryn Mawr College [Contact Us]
Held at: Historical Society of Pennsylvania [Contact Us]
Held at: Wagner Free Institute of Science [Contact Us]
Held at: Chester County Historical Society [Contact Us]
Held at: Library Company of Philadelphia [Contact Us]
Held at: Library Company of Philadelphia [Contact Us]
Held at: Library Company of Philadelphia [Contact Us]
Held at: Philadelphia Archdiocesan Historical Research Center [Contact Us]
Held at: Philadelphia Archdiocesan Historical Research Center [Contact Us]