Columbia subject headings:
Russia--Intellectual life--1801-1917.
Russia--Religion--19th century.
Russia--Religion--20th century.
Harvard subject headings:
Intellectuals--Russia.
Philosophy, Russian--Religious aspects.
Religion and culture--Russia.
Russia--Intellectual life--1801-1917.
Russia--Religion--19th century.
Russia--Religion--20th century.
Princeton subject headings: