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Start Over You searched for: Holding Institution University of Pennsylvania ✖ Remove constraint Holding Institution: University of Pennsylvania Scribe Ṣ̣adr al-Dīn Muḥammad ibn Kamāl al-Dīn Iṣfahānī ✖ Remove constraint Scribe: Ṣ̣adr al-Dīn Muḥammad ibn Kamāl al-Dīn Iṣfahānī Keywords Astronomy ✖ Remove constraint Keywords: Astronomy