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