Porter, Dot2023-05-232023-05-232015-01-102015-04-25https://repository.upenn.edu/handle/20.500.14332/46369http://hdl.library.upenn.edu/1017/d/medren/5857874Arithmetic--Early works to 1900Mathematics--Early works to 1800Merchants--Italy CodicesTreatisesManuscripts Italian--15th centuryManuscripts RenaissanceBook