Columbia subject headings:
Harvard subject headings:
Labor movement--Greece--Thessalonikē--20th century.
Labor unions--Greece--Thessalonikē--History--20th century.
Thessalonikē (Greece)--Economic conditions--20th century.
Princeton subject headings:
Labor movement--Greece--Thessalonikē--History--20th century.
Thessalonikē (Greece)--Social conditions--20th century.
Working class--Greece--Thessalonikē--History--20th century.