1. Or 12540/1 Reference (shelfmark): Or 12540/1 Title: Risālah fī al-ʿamal bi-al-asṭurlāb Scope & Content: Author: Ibn al-Ṣaffār al-Ghāfiqī, Aḥmad ibn ʿAbd Allāh Subject: Astronomy, Arab--Early works to 1800 Collection Area: Oriental Manuscripts Languages: Arabic Date Range: 18th century-19th century Extent: 1 item