Columbia subject headings:
Islam--Doctrines--Early works to 1800.
Islamic philosophy--Early works to 1800.
Sufism--Early works to 1800.
Theological anthropology--Islam--Early works to 1800.
Harvard subject headings:
Islam--Doctrines--Early works to 1800
Islamic philosophy--Early works to 1800
Sufism--Early works to 1800
Theological anthropology--Islam--Early works to 1800.
Princeton subject headings:
Personal correspondence.
Sufism.
Ṣadr al-Dīn al-Qūnawī, Muḥammad ibn Isḥāq, -1273 or 1274--Correspondence.
Ṭūsī, Naṣīr al-Dīn Muḥammad ibn Muḥammad, 1201-1274.