Columbia subject headings:
Agriculture--Balkan Peninsula--History.
Agriculture--Europe, Eastern--History.
Balkan Peninsula--Antiquities.
Europe, Eastern--Antiquities.
Harvard subject headings:
Agriculture--Balkan Peninsula--History.
Agriculture--Europe, Eastern--History.
Balkan Peninsula--Antiquities.
Europe, Eastern--Antiquities.
Princeton subject headings:
Agriculture--Balkan Peninsula--History.
Balkan Peninsula--Antiquities.