Columbia subject headings:
Mediation, International.
Northern Ireland--Foreign economic relations--United States.
Northern Ireland--Politics and government--1968-1998.
Peace.
United States--Foreign economic relations--Northern Ireland.
Harvard subject headings:
Mediation, International.
Northern Ireland--Foreign economic relations--United States.
Northern Ireland--Politics and government--1968-1998.
Peace
United States--Foreign economic relations--Northern Ireland.
Princeton subject headings:
Mediation, International.
Northern Ireland--Foreign economic relations--United States.
Northern Ireland--Politics and government--1969-.
Peace.
United States--Foreign economic relations--Northern Ireland.