1. IO Islamic 1270/20 Reference (shelfmark): IO Islamic 1270/20 Title: Qawl ... fī istikhrāj masʾalah ʿadadīyah Scope & Content: Author: Alhazen, 965-1039 VIAF ID: 90038995 Subject: Mathematics, Arab--Early works to 1800 Collection Area: Oriental Manuscripts Languages: Arabic Date Range: 17th century Extent: 1 item