Columbia subject headings:
Yūsuf, khāṣṣ-hājib, active 11th century. Ḱutadgú biliğ.
Harvard subject headings:
Yūsuf, khāṣṣ-hājib, active 11th century. Ḱutadgú biliğ.
Princeton subject headings:
Yūsuf, khāṣṣ-hājib, active 11th century. Ḱutadgú biliğ.