Columbia subject headings:
Immigrants--North America--History.
Italians--America--History.
Italy--Emigration and immigration--History.
Harvard subject headings:
Immigrants--North America--History.
Italians--America--History.
Italy--Emigration and immigration--History.
Princeton subject headings:
Immigrants--North America--History.
Italians--America--History.
Italy--Emigration and immigration--History.