Columbia subject headings:
Turks--Bulgaria--History.
Harvard subject headings:
Muslims--Bulgaria--History--19th century.
Muslims--Bulgaria--History--20th century.
Turks--Bulgaria--History--19th century.
Turks--Bulgaria--History--20th century.
Princeton subject headings:
Muslims--Bulgaria--History--19th century.
Muslims--Bulgaria--History--20th century.
Turks--Bulgaria--History--19th century.
Turks--Bulgaria--History--20th century.