Columbia subject headings:
Russia--History--February Revolution, 1917--Causes.
Russia--History--Nicholas II, 1894-1917.
Russia--History--Revolution, 1905-1907--Causes.
Soviet Union--History--Revolution, 1917-1921--Causes.
Harvard subject headings:
Russia--History--February Revolution, 1917.
Soviet Union--History--Revolution, 1917-1921.
Princeton subject headings:
Russia--History--20th century.
Russia--History--February Revolution, 1917.
Russia--History--Revolution, 1905-1907.
Soviet Union--History--Revolution, 1917-1921.