1. IO Islamic 923/3 Reference (shelfmark): IO Islamic 923/3 Title: Kitāb Thāwudhūsiyūs fī al-ayyām wa-al-layālá Scope & Content: Author: Ṭūsī, Naṣīr al-Dīn Muḥammad ibn Muḥammad, 1201-1274 VIAF ID: 12392936 Subject: Mathematics, Arab--Early works to 1800 Collection Area: Oriental Manuscripts Languages: Arabic Date Range: 18th century Extent: 1 item