Columbia subject headings:
Northern Ireland--Social life and customs.
Protestants--Northern Ireland--History.
Scots-Irish--Foreign countries--History.
Scots-Irish--History.
Harvard subject headings:
Protestants--Northern Ireland--History.
Scots-Irish--Australia.
Scots-Irish--Canada.
Scots-Irish--New Zealand.
Scots-Irish--United States
Scots-Irish--United States--History.
Scots-Irish.
Ulster (Northern Ireland and Ireland)--History.
Princeton subject headings:
Northern Ireland--Social life and customs.
Protestants--Northern Ireland--History.
Scots-Irish--Foreign countries--History.
Scots-Irish--History.