Columbia subject headings:
Saint Petersburg (Russia)--Politics and government.
Soviet Union--History--Revolution, 1917-1921.
Strikes and lockouts--Russia (Federation)--Saint Petersburg--History.
Working class--Political activity--Russia (Federation)--Saint Petersburg--History.
Working class--Russia (Federation)--Saint Petersburg--History.
Harvard subject headings:
Saint Petersburg (Russia)--Politics and government.
Soviet Union--History--Revolution, 1917-1921.
Strikes and lockouts--Russia (Federation)--Saint Petersburg--History.
Working class--Russia (Federation)--Saint Petersburg--History.
Working class--Russia (Federation)--Saint Petersburg--Political activity--History.
Princeton subject headings: