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