Columbia subject headings:
Canada--Emigration and immigration--Historiography.
Irish Americans--Historiography.
Irish--Canada--Historiography.
United States--Emigration and immigration--Historiography.
Harvard subject headings:
Canada--Emigration and immigration--Historiography.
Irish Americans--Historiography.
Irish--Canada--Historiography.
United States--Emigration and immigration--Historiography.
Princeton subject headings:
Canada--Emigration and immigration--Historiography.
Irish Americans--Historiography.
Irish--Canada--Historiography.
United States--Emigration and immigration--Historiography.