Columbia subject headings:
English literature--Irish authors--History and criticism.
English poetry--20th century--History and criticism.
Ethics in literature.
Heaney, Seamus, 1939-2013--Criticism and interpretation.
Heaney, Seamus, 1939-2013--Literary style.
Ireland--In literature.
Poetry--Moral and ethical aspects.
Politics and literature--Northern Ireland--History--20th century.
Religion and literature--Northern Ireland.
Harvard subject headings:
English literature--Irish authors--History and criticism
English poetry--20th century--History and criticism
Ethics in literature.
Heaney, Seamus, 1939-2013--Criticism and interpretation.
Ireland--In literature.
Poetry--Moral and ethical aspects.
Politics and literature--Northern Ireland--History--20th century.
Religion and literature--Northern Ireland.
Princeton subject headings:
Heaney, Seamus, 1939-2013--Criticism and interpretation.