Columbia subject headings:
Turkey--History--1288-1453.
Turkey--History--Ottoman Empire, 1288-1918.
Harvard subject headings:
Seljuks.
Turkey--History--1288-1453.
Turkey--History--Ottoman Empire, 1288-1918.
Princeton subject headings:
Turkey--History--1288-1453.
Turkey--History--Ottoman Empire, 1288-1918.