Columbia subject headings:
Balkan Peninsula--Foreign economic relations--Soviet Union.
Moldavia--Foreign economic relations--Soviet Union.
Soviet Union--Foreign economic relations--Balkan Peninsula.
Soviet Union--Foreign economic relations--Moldavia.
Harvard subject headings:
Balkan Peninsula--Foreign economic relations--Russia--17th century.
Moldavia--Foreign economic relations--Russia
Russia--Foreign economic relations--Balkan Peninsula--17th century.
Russia--Foreign economic relations--Moldavia--17th century.
Princeton subject headings:
Balkan Peninsula--Foreign economic relations--Russia.
Moldova--Foreign economic relations--Russia.
Russia--Foreign economic relations--Balkan Peninsula.
Russia--Foreign economic relations--Moldova.