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Office of the Secretary Records, 1940-2000 (bulk) 1743-2011 (inclusive)
Held at: University of Pennsylvania: University Archives and Records Center [Contact Us]
Held at: University of Pennsylvania: University Archives and Records Center [Contact Us]
Held at: Princeton University Library: University Archives [Contact Us]
Held at: Pennsylvania Horticultural Society [Contact Us]
Held at: Temple University Libraries Special Collections Research Center [Contact Us]
Held at: Haverford College Quaker & Special Collections [Contact Us]
Held at: German Society of Pennsylvania: Joseph P. Horner Memorial Library [Contact Us]
Held at: Haverford College Quaker & Special Collections [Contact Us]
Held at: University of Pennsylvania: Kislak Center for Special Collections, Rare Books and Manuscripts [Contact Us]
Held at: Wagner Free Institute of Science [Contact Us]
Held at: Chester County Historical Society [Contact Us]