Columbia subject headings:
Harvard subject headings:
Avicenna, 980-1037--Contributions in metaphysics.
Islamic philosophy.
Metaphysics
Rāzī, Fakhr al-Dīn Muḥammad ibn ʻUmar, 1149 or 1150-1210--Contributions in metaphysics.
Ṭūsī, Naṣīr al-Dīn Muḥammad ibn Muḥammad, 1201-1274--Contributions in metaphysics.
Princeton subject headings:
Islamic philosophy--Iran.