Columbia subject headings:
Germany--Emigration and immigration--History--20th century.
Germany--Emigration and immigration.
Immigrants--Germany--Social conditions.
Italians--Germany--Economic conditions.
Italians--Germany--Social conditions.
Italy--Emigration and immigration.
Harvard subject headings:
Germany--Emigration and immigration--History--20th century.
Italians--Germany--Economic conditions.
Italians--Germany--Social conditions.
Princeton subject headings:
Germany--Emigration and immigration--History--20th century.
Italians--Germany--Economic conditions.
Italians--Germany--Social conditions.