Columbia subject headings:
Canada--Emigration and immigration--History.
Catholics--Canada--History.
Catholics--United States--History.
Italians--Canada--History.
Italians--United States--History.
Italy--Emigration and immigration--History.
United States--Emigration and immigration--History.
Harvard subject headings:
Canada--Church history.
Canada--Emigration and immigration--History.
Catholics--Canada--History.
Catholics--United States--History
Italians--Canada--History.
Italians--United States--History.
Italy--Emigration and immigration--History.
United States--Church history.
United States--Emigration and immigration--History.
Princeton subject headings: