Columbia subject headings:
Harvard subject headings:
Alfonso X, King of Castile and Leon, 1221-1284--Knowledge--Astronomy.
Astronomy, Arab.
Princeton subject headings:
Alfonso X, King of Castile and Leon, 1221-1284--Knowledge--Astronomy.
Alhazen, 965-1039. Fī ḥayāt al-ʻālam--Criticism, Textual.
Astrology, Arab.
Astronomy, Arab.
Astronomy, Medieval.
Astronomy--Spain.
Ṣūfī, ʻAbd al-Raḥmān ibn ʻUmar, 903-986. Ṣuwar al-kawākib--Criticism, Textual.