1. Or 12153/2 Reference (shelfmark): Or 12153/2 Title: Risālah fī ʿilm al-darajah Scope & Content: Author: Andalusī, Ibrāhīm ibn Muḥammad Subject: Astronomy, Arab--Early works to 1800 Collection Area: Oriental Manuscripts Languages: Arabic Date Range: 0988 Extent: 1 item