Joseph ibn Nahmias and The Light of the World Biṭrūjī Kitāb fī al-hay’ah The Arabic text of Biṭrūjī's Kitāb fī al-hay’ah Real Biblioteca de El Escorial, MSS. Árabes 963, 71v 12th century Image found in Bernard R. Goldstein, On The Principles of Astronomy (New Haven: Yale University Press, 1971), p. 283
