Columbia subject headings:
Jews--Greece--Thessalonikē--History--20th century.
Labor unions--Greece--History--20th century.
Harvard subject headings:
Jews--Greece--Thessalonikē--History--20th century.
Labor unions--Greece--History--20th century.
Princeton subject headings:
Jews--Greece--Thessalonikē--History--20th century.
Labor unions--Greece--History--20th century.