Columbia subject headings:
Harvard subject headings:
Moscow (Russia)--Social conditions.
Soviet Union--History--Revolution, 1917-1921.
Working class--Russia (Federation)--Moscow--History--20th century.
Working class--Russia (Federation)--Moscow--Political activity--History.
Working class--Russian S.F.S.R.--Moscow--Political activity--History.
Princeton subject headings:
Moscow (Russia)--Social conditions.
Soviet Union--History--Revolution, 1917-1921.
Working class--Russia (Federation)--Moscow--Political activity--History.