Columbia subject headings:
Shumen (Bulgaria)--History.
Turkey--History--19th century.
Turks--Bulgaria--Shumen--History.
Harvard subject headings:
Shumen (Bulgaria)--History--Economic conditions.
Shumen (Bulgaria)--History--Social conditions.
Shumen (Bulgaria)--History.
Turkey--History--Ottoman Empire, 1288-1918.
Princeton subject headings:
Shumen (Bulgaria)--History.
Turkey--History--19th century.
Turks--Bulgaria--Shumen--History.