Columbia subject headings:
Harvard subject headings:
Ethnology--Ireland
Ethnology--Religious aspects--Christianity
Ireland--Boundaries--Congresses.
Ireland--Boundaries.
Ireland--Politics and government.
Northern Ireland--Boundaries--Congresses.
Territory, National--Social aspects--Ireland.
Ulster (Northern Ireland and Ireland)--Congresses.
Princeton subject headings:
Ireland--Boundaries--Congresses.
Northern Ireland--Boundaries--Congresses.
Ulster (Northern Ireland and Ireland)--Congresses.