Columbia subject headings:
Astronomy, Arab--History.
Astronomy--Mathematics--History.
Khuwārizmī, Muḥammad ibn Mūsá, active 813-846.
Harvard subject headings:
Astronomy, Arab--History.
Astronomy--Mathematics--History.
Khuwārizmī, Muḥammad ibn Mūsá, active 813-846.
Princeton subject headings: