Columbia subject headings:
Turkey--History--Ottoman Empire, 1288-1918.
Turkey--History--To 1453.
Turks--History.
Harvard subject headings:
Asia, Central--History.
Turkey--History--Ottoman Empire, 1288-1918.
Turkey--History--To 1453.
Turks--History
Princeton subject headings:
Turkey--History--Ottoman Empire, 1288-1918.
Turks--History.