Title: Risālat al-nafʻ al-ʻāmm fī al-ʻamal bi-al-rubʻ al-tāmm li-Ibn al-Shāṭir al-Dimashqī (777 H / 1375 M)
Subjects: Quadrants (Astronomical instruments), Arab Astronomy
Places: Islamic Empire
Time periods: 14th century