Columbia subject headings:
Balkan Peninsula--Foreign economic relations--Germany.
Balkan Peninsula--Foreign economic relations--Turkey.
Exports--Balkan Peninsula.
Germany--Foreign economic relations--Balkan Peninsula.
Investments, Foreign--Balkan Peninsula.
Turkey--Foreign economic relations--Balkan Peninsula.
Harvard subject headings:
Balkan Peninsula--Foreign economic relations--Germany.
Balkan Peninsula--Foreign economic relations--Turkey.
Exports--Balkan Peninsula.
Germany--Foreign economic relations--Balkan Peninsula.
Investments, Foreign--Balkan Peninsula.
Turkey--Foreign economic relations--Balkan Peninsula.
Princeton subject headings:
Balkan Peninsula--Foreign economic relations--Germany.
Balkan Peninsula--Foreign economic relations--Turkey.
Exports--Balkan Peninsula.
Germany--Foreign economic relations--Balkan Peninsula.
Investments, Foreign--Balkan Peninsula.
Turkey--Foreign economic relations--Balkan Peninsula.