Columbia subject headings:
Harvard subject headings:
Europe--Emigration and immigration--History--20th century.
Foreign workers, Italian--Europe--Economic conditions.
Foreign workers, Italian--Europe--History.
Foreign workers, Italian--France--History.
Foreign workers, Italian--Germany--History.
Italy--Emigration and immigration--Economic aspects.
Princeton subject headings:
Europe--Emigration and immigration.
Foreign workers, Italian--Europe--History.
Italy--Emigration and immigration.