Columbia subject headings:
Saint Petersburg (Russia)--History--Revolution, 1917-1921.
Social psychology--Russia (Federation)--Saint Petersburg.
Working class--Political activity--Russia (Federation)--Saint Petersburg.
Harvard subject headings:
Saint Petersburg (Russia)--History--Revolution, 1917-1921.
Social psychology--Russia (Federation)--Saint Petersburg.
Working class--Russia (Federation)--Saint Peterburg--Political activity.
Princeton subject headings:
Saint Petersburg (Russia)--History--Revolution, 1917-1921.
Social psychology--Russia (Federation)--Saint Petersburg.
Working class--Russia (Federation)--Saint Peterburg--Political activity.