Columbia subject headings:
Bessarabia (Moldova and Ukraine)
Bessarabia (Moldova and Ukraine)--History.
Eastern question (Balkan)
Romania--Foreign relations--Soviet Union.
Russia--Foreign relations--1801-1825.
Soviet Union--Foreign relations--Romania.
Harvard subject headings:
Bessarabia (Moldova and Ukraine)--History.
Eastern question (Balkan)
Russia--Foreign relations--1801-1825.
Princeton subject headings: