Porter, Dot2023-05-232022-03-142022-03-142022-03-14https://repository.upenn.edu/handle/20.500.14332/46737http://hdl.library.upenn.edu/1017/d/medren/9954111003503681youtubeArithmetic--Early works to 1900Business mathematics--Early works to 1800Mathematics--Early works to 1800 CodicesManuscripts Hebrew--15th centuryManuscripts RenaissanceHistory of Science, Technology, and MedicineMedieval StudiesMedia