Columbia subject headings:
Seljuks--Turkey--History.
İzzeddin Keykâvus I, Sultan of the Seljuks, -1220.
Harvard subject headings:
İzzeddin Keykâvus I, Sultan of the Seljuks, -1220
Kaykāʼūs, I, Sultan of the Seljuks, -1220.
Seljuks--Turkey--History.
Princeton subject headings:
İzzeddin Keykâvus I, Sultan of the Seljuks, -1220.
Seljuks--Turkey--History.