Columbia subject headings:
Philosophy, Russian--20th century.
Russia (Federation)--History--Philosophy.
Russians--Foreign countries--Attitudes.
Russians--Foreign countries--History--20th century.
Soviet Union--History--Philosophy.
Harvard subject headings:
Philosophy, Russian--20th century.
Russia (Federation)--History--Philosophy.
Russians--Foreign countries--Attitudes.
Russians--Foreign countries--History--20th century
Soviet Union--History--Philosophy.
Princeton subject headings:
Soviet Union--History--Philosophy.