Columbia subject headings:
Saint Petersburg (Russia)--Economic conditions.
Saint Petersburg (Russia)--Social conditions.
Working class--Russia (Federation)--Saint Petersburg.
Harvard subject headings:
Saint Petersburg (Russia)--Economic conditions.
Saint Petersburg (Russia)--Social conditions.
Working class--Russia (Federation)--Saint Petersburg
Princeton subject headings:
Saint Petersburg (Russia)--Economic conditions.
Saint Petersburg (Russia)--Social conditions.
Working class--Russia (Federation)--Saint Petersburg.