Columbia subject headings:
Istanbul (Turkey)--Congresses--History.
Turkey--History--Ottoman Empire, 1288-1918--Congresses.
Harvard subject headings:
Istanbul (Turkey)--Congresses--History.
Turkey--Congresses--History--Ottoman Empire, 1288-1918.
Princeton subject headings:
Istanbul (Turkey)--Congresses--History.
Turkey--Congresses--History--Ottoman Empire, 1288-1918.