Porter, Dot2023-05-232023-05-232015-03-062015-04-25https://repository.upenn.edu/handle/20.500.14332/46411http://hdl.library.upenn.edu/1017/d/medren/6087669MathematicsCalculus Lecture notesDiagramsCorrespondenceManuscripts French--19th centuryManuscripts DigitalFacsimile of LJS 218, Devoirs et mes conférences de PoincaréBook