Columbia subject headings:
Prisoners--Legal status, laws, etc.--Northern Ireland.
Harvard subject headings:
Irish Republican Army.
Northern Ireland--History--1968-1998.
Northern Ireland--Politics and government--1968-1998.
Sinn Fein.
Princeton subject headings:
Ireland--Politics and government--20th century.
Irish Republican Army--History.
Prisons--Northern Ireland--History--20th century.
Sinn Fein.