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Lorenz and Zehring family papers, 1880-2018 (inclusive) 1920s-1970s (bulk)
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: Academy of Natural Sciences, Philadelphia [Contact Us]
Held at: University of Pennsylvania: Barbara Bates Center for the Study of The History of Nursing [Contact Us]
Held at: Free Library of Philadelphia: Rare Book Department [Contact Us]
Held at: Philadelphia Archdiocesan Historical Research Center [Contact Us]
Held at: Philadelphia Museum of Art Archives [Contact Us]
Held at: Free Library of Philadelphia: Rare Book Department [Contact Us]
Held at: University of Pennsylvania: Penn Museum Archives [Contact Us]
Held at: Drexel University: Archives and Special Collections [Contact Us]
Held at: Pennsylvania Horticultural Society [Contact Us]