Columbia subject headings:
Ibn Khaldūn, 1332-1406.
Sufism--Africa, North.
Sufism--History.
Sufism--Spain.
Harvard subject headings:
Ibn Khaldūn, 1332-1406.
Sufism--Africa, North.
Sufism--History
Sufism--Spain.
Princeton subject headings:
Ibn Khaldūn, 1332-1406.
Sufism--Africa, North.
Sufism--History.
Sufism--Spain.