Columbia subject headings:
Harvard subject headings:
Agriculture and state--Greece--20th century--History.
Balkan Peninsula--Ethnic relations.
Nationalism--Bulgaria--History--20th century.
Nationalism--Greece--History--20th century.
Princeton subject headings:
Agriculture and state--Bulgaria--History--20th century.
Agriculture and state--Greece--History--20th century.
Nationalism--Bulgaria--History--20th century.
Nationalism--Greece--History--20th century.