Columbia subject headings:
Turkey--Commerce--History--19th century--Congresses.
Turkey--Economic conditions--Congresses.
Turkey--History--Ottoman Empire, 1288-1918--Congresses.
Turkey--Social conditions--Congresses.
Harvard subject headings:
Turkey--Commerce--History--19th century--Congresses.
Turkey--Economic conditions--1288-1918--Congresses.
Turkey--Economic conditions--Congresses.
Turkey--Social conditions--1288-1918--Congresses.
Turkey--Social conditions--Congresses.
Princeton subject headings:
Turkey--Economic conditions--Congresses.
Turkey--Social conditions--Congresses.