Columbia subject headings:
Philosophy, Russian--History.
Harvard subject headings:
Enlightenment--Russia
Russia--History--Philosophy.
Russia--Intellectual life--18th century.
Utopias--Russia--History--18th century.
Princeton subject headings:
Enlightenment--Russia.
Russia--History--Philosophy.
Russia--Intellectual life--18th century.
Utopias--Russia--History--18th century.