Columbia subject headings:
Russia--Foreign relations--1689-1801.
Soviet Union--Relations--Yugoslavia.
Yugoslavia--Relations--Soviet Union.
Harvard subject headings:
Russia--Foreign relations--1689-1801.
Russia--Relations--Yugoslavia.
Soviet Union--Relations--Yugoslavia.
Yugoslavia--Relations--Russia.
Yugoslavia--Relations--Soviet Union.
Princeton subject headings:
Russia--Foreign relations--1689-1801.
Russia--Relations--Yugoslavia.
Yugoslavia--Relations--Russia.