Columbia subject headings:
Soviet Union--Foreign relations--United States.
Soviet Union--Foreign relations.
United States--Foreign relations--Soviet Union.
World politics--20th century.
Harvard subject headings:
Exchange of persons programs.
Soviet Union--Foreign public opinion.
Soviet Union--Foreign relations--1985-1991.
Princeton subject headings:
Exchange of persons programs.
Soviet Union--Foreign public opinion.
Soviet Union--Foreign relations--1985-1991.