Columbia subject headings:
Labor movement--Soviet Union--History.
Russia--Politics and government--1904-1914.
Soviet Union--History--Revolution, 1917-1921.
Working class--Political activity--Soviet Union--History.
Harvard subject headings:
Soviet Union--History--Revolution, 1917-1921.
Working class--Soviet Union--Political activity--History--20th century.
Princeton subject headings:
Labor movement--Russia--History.
Russia--Politics and government--1904-1914.
Soviet Union--History--Revolution, 1917-1921.
Working class--Russia--Political activity--History.