Columbia subject headings:
Chile--Relations--Soviet Union.
Latin America--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--1945-1991.
Soviet Union--Foreign relations--Latin America.
Soviet Union--Relations--Chile.
Unidad Popular.
Harvard subject headings:
Chile--Relations--Soviet Union.
Latin America--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--1945-1991.
Soviet Union--Foreign relations--Latin America.
Soviet Union--Relations--Chile.
Unidad Popular.
Princeton subject headings:
Chile--Politics and government--1970-1973.
Chile--Relations--Soviet Union.
Soviet Union--Relations--Chile.
Unidad Popular.