Columbia subject headings:
Saint Petersburg (Russia)--Commerce--History.
Saint Petersburg (Russia)--History.
Saint Petersburg (Russia)--Social life and customs.
Harvard subject headings:
Saint Petersburg (Russia)--Commerce.
Saint Petersburg (Russia)--History.
Saint Petersburg (Russia)--Social life and customs.
Princeton subject headings:
Saint Petersburg (Russia)--Commerce--History.
Saint Petersburg (Russia)--History.
Saint Petersburg (Russia)--Social life and customs.