Columbia subject headings:
Moldavia--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Moldavia.
Soviet Union--Foreign relations--Romania--Wallachia.
Soviet Union--Foreign relations--Turkey.
Turkey--Foreign relations--Soviet Union.
Wallachia--Foreign relations--Soviet Union.
Harvard subject headings:
Moldavia--Foreign relations--Russia.
Russia--Foreign relations--Moldavia.
Russia--Foreign relations--Romania--Wallachia.
Russia--Foreign relations--Turkey.
Turkey--Foreign relations--Russia.
Wallachia--Foreign relations--Russia.
Princeton subject headings:
Eastern question (Balkan)
Moldavia--History.
Russia--Foreign relations--1689-1801.
Russia--Foreign relations--1801-1825.
Wallachia--History.