Columbia subject headings:
Moldavia--Annexation to Soviet Union.
Romania--Boundaries--Soviet Union.
Romania--Foreign relations--Soviet Union.
Soviet Union--Boundaries--Romania.
Soviet Union--Foreign relations--Romania.
Harvard subject headings:
Moldova--Annexation to the Soviet Union.
Romania--Boundaries--Soviet Union.
Romania--Foreign relations--Soviet Union.
Soviet Union--Boundaries--Romania.
Soviet Union--Foreign relations--Romania.
Princeton subject headings:
Moldova--Annexation to the Soviet Union.
Romania--Boundaries--Soviet Union.
Romania--Foreign relations--Soviet Union.
Soviet Union--Boundaries--Romania.
Soviet Union--Foreign relations--Romania.