Porter, Dot2023-05-232023-05-232015-01-092015-04-25https://repository.upenn.edu/handle/20.500.14332/46386http://hdl.library.upenn.edu/1017/d/medren/4646348Arithmetic--Early works to 1900Astronomy--Early works to 1800Astronomy MedievalCosmography--Early works to 1800 CodicesDiagramsTreatisesManuscripts Latin--13th centuryManuscripts MedievalBook