Columbia subject headings:
Berkyaruk, Sultan of the Seljuks, 1079-1104.
Seljuks--History.
Harvard subject headings:
Berkyaruk, Sultan, 1081-1104.
Seljuks--History.
Princeton subject headings:
Berkyaruk, Sultan of the Seljuks, 1079-1104.
Seljuks--History.