Columbia subject headings:
Russia--History--Nicholas II, 1894-1917.
Soviet Union--History--Philosophy.
Soviet Union--History--Revolution, 1917-1921--Causes.
Harvard subject headings:
Philosophy, Russian.
Russia--Civilization.
Russia--History--Nicholas II, 1894-1917.
Russia--History--Philosophy.
Soviet Union--History--Revolution, 1917-1921--Causes.
Princeton subject headings: