Columbia subject headings:
Balkan Peninsula--History--Textbooks.
Turkey--History--1453-1683--Textbooks.
Turkey--History--1683-1829--Textbooks.
Turks--Balkan Peninsula--History--Textbooks.
Harvard subject headings:
Balkan Peninsula--History--Textbooks.
Turkey--History--1453-1683--Textbooks.
Turkey--History--1683-1829--Textbooks.
Turks--Balkan Peninsula--History--Textbooks.
Princeton subject headings: