Columbia subject headings:
English poetry--20th century--History and criticism.
English poetry--Irish authors--History and criticism.
Harvard subject headings:
English poetry--20th century--History and criticism
English poetry--Irish authors--20th century--History and criticism.
Princeton subject headings:
English poetry--20th century--History and criticism.
English poetry--20th century--Themes, motives.
English poetry--Irish authors--20th century--History and criticism.
English poetry--Irish authors--20th century--Themes, motives.