Porter, Dot2023-05-232023-05-232015-02-142015-04-25https://repository.upenn.edu/handle/20.500.14332/46484http://hdl.library.upenn.edu/1017/d/medren/5954272Arithmetic--Early works to 1900Mathematics Arab--Early works to 1800 CodicesCommentariesManuscripts Arabic--15th centuryManuscripts MedievalManuscripts RenaissanceFacsimile of LJS 481, Commentary on Talkhīṣ aʻmāl al-ḥisābBook