1. Add MS 23403/8 Reference (shelfmark): Add MS 23403/8 Title: Risālah fī qiyām al-arḍ wasaṭ al-samāʾ Scope & Content: Author: Avicenna, 980-1037 VIAF ID: 89770781 Subject: Astronomy, Arab--Early works to 1800 Collection Area: Oriental Manuscripts Languages: Arabic Date Range: 1019 Extent: 1 item