Columbia subject headings:
Greece--Boundaries.
Harvard subject headings:
Albania--Boundaries--Greece.
Balkan Peninsula--Boundaries.
Balkan Peninsula--Foreign relations--Greece.
Bulgaria--Boundaries--Greece.
Greece--Boundaries--Albania.
Greece--Boundaries--Bulgaria.
Greece--Boundaries--Turkey.
Greece--Boundaries.
Greece--Foreign relations--Balkan Peninsula.
Territory, National--Greece.
Turkey--Boundaries--Greece.
Princeton subject headings:
Greece--Boundaries--History--20th century.
Greece--Foreign relations--20th century.