Columbia subject headings:
Harvard subject headings:
Khuwārizmī, Muḥammad ibn Aḥmad, -997 or 998. Mafātīḥ alʻUlūm.
Princeton subject headings:
Khuwārizmī, Muḥammad ibn Aḥmad, -997 or 998. Mafātīḥ al-ʻulūm.