Columbia subject headings:
Soviet Union--History--Revolution, 1917-1921.
Working class--Russia (Federation)--Siberia.
Harvard subject headings:
Soviet Union--History--Revolution, 1917-1921.
Working class--Russia (Federation)--Siberia.
Princeton subject headings:
Soviet Union--History--Revolution, 1917-1921.
Working class--Russia (Federation)--Siberia.