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William H. Helfand collection of medical quackery ephemera, 1736-2006, undated (inclusive)
Held at: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts [Contact Us]
Held at: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts [Contact Us]
Held at: Old York Road Historical Society [Contact Us]
Held at: Library Company of Philadelphia [Contact Us]
Held at: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts [Contact Us]
Held at: Historical Medical Library of The College of Physicians of Philadelphia [Contact Us]
Held at: Goschenhoppen Historians, Inc. [Contact Us]
Held at: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts [Contact Us]
Held at: Historical Medical Library of The College of Physicians of Philadelphia [Contact Us]
Held at: Philadelphia Archdiocesan Historical Research Center [Contact Us]
Held at: Pottstown Historical Society [Contact Us]