Columbia subject headings:
Communism--Vietnam--History--20th century.
Soviet Union--Foreign relations--Vietnam.
Vietnam--Foreign relations--Soviet Union.
Vietnam--Politics and government--1945-1975.
Vietnam--Politics and government--1975-
Harvard subject headings:
Communism--Vietnam--History--20th century.
Soviet Union--Foreign relations--Vietnam.
Vietnam--Foreign relations--Soviet Union.
Vietnam--Politics and government--1945-1975.
Vietnam--Politics and government--1975-
Princeton subject headings:
Communism--Vietnam--History--20th century.
Soviet Union--Foreign relations--Vietnam.
Vietnam--Foreign relations--Soviet Union.
Vietnam--Politics and government--1945-1975.
Vietnam--Politics and government--1975-