Columbia subject headings:
Petrozavodsk (Russia)--History.
Russia--History--Revolution, 1905-1907.
Working class--Russia (Federation)--Petrozavodsk.
Harvard subject headings:
Petrozavodsk (Russia)--History.
Russia--History--Revolution, 1905-1907.
Working class--Russia (Federation)--Petrozavodsk.
Princeton subject headings: