Columbia subject headings:
Siberia (Russia)--History.
Working class--Russia (Federation)--Siberia.
Harvard subject headings:
Labor--Russia (Federation)--Siberia.
Siberia (Russia)--History
Siberia (Russia)--History--Revolution, 1917-1921.
Working class--Russia (Federation)--Siberia--History.
Working class--Russia (Federation)--Siberia.
Princeton subject headings:
Siberia (Russia)--History.
Working class--Russia (Federation)--Siberia.