Columbia subject headings:
Moscow (Russia)--Philosophy.
Philosophy, Russian--20th century.
Saint Petersburg (Russia)--Philosophy.
Harvard subject headings:
Moscow (Russia)--History--Philosophy.
Moscow (Russia)--Philosophy.
Philosophy, Russian--20th century.
Russia (Federation)--Capital and capitol--History.
Russia--Capital and capitol.
Saint Petersburg (Russia)--History--Philosophy.
Saint Petersburg (Russia)--Philosophy.
Princeton subject headings:
Philosophy, Russian--20th century.