Columbia subject headings:
Philosophy, Russian--20th century.
Russia (Federation)--History--Philosophy.
Harvard subject headings:
Philosophy, Russian--20th century.
Razumovich, N. N. (Nikolaĭ Nikanorovich)
Russia (Federation)--History--Philosophy.
Russia (Federation)--Politics and government.
Schmitt, Carl, 1888-1985--Political and social views.
Princeton subject headings:
Philosophy, Russian--20th century.
Russia (Federation)--History--Philosophy.