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Start Over You searched for: Title Masʼalat al-istibdāl ✖ Remove constraint Title: Masʼalat al-istibdāl Author Muḥammad ibn Ibrāhīm Wafāʼī ✖ Remove constraint Author: Muḥammad ibn Ibrāhīm Wafāʼī Keywords Fifteenth century ✖ Remove constraint Keywords: Fifteenth century