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H. A. Pilsbry papers, 1900-1953 (bulk) 1885-1957 (inclusive)
Held at: Academy of Natural Sciences, Philadelphia [Contact Us]
Held at: Academy of Natural Sciences, Philadelphia [Contact Us]
Held at: German Society of Pennsylvania: Joseph P. Horner Memorial Library [Contact Us]
Held at: German Society of Pennsylvania: Joseph P. Horner Memorial Library [Contact Us]
Held at: German Society of Pennsylvania: Joseph P. Horner Memorial Library [Contact Us]
Held at: German Society of Pennsylvania: Joseph P. Horner Memorial Library [Contact Us]
Held at: German Society of Pennsylvania: Joseph P. Horner Memorial Library [Contact Us]
Held at: Historical Society of Frankford [Contact Us]
Held at: Historical Society of Frankford [Contact Us]
Held at: Historical Society of Frankford [Contact Us]
Held at: Historical Society of Fort Washington [Contact Us]