Columbia subject headings:
Harvard subject headings:
Industries--Russia (Federation)--Saint Petersburg--History.
Labor--Saint Petersburg--History.
Working class--Russia (Federation)--Saint Petersburg--History.
Working class--Saint Petersburg--History.
Princeton subject headings:
Industries--Russia (Federation)--Saint Petersburg--History--Sources.
Labor movement--Russia (Federation)--Saint Petersburg--History--Sources.
Soviet Union--Economic conditions--1917-1945.
Working class--Russia (Federation)--Saint Petersburg--History--Sources.