Columbia subject headings:
Harvard subject headings:
English poetry--20th century--Appreciation.
English poetry--20th century--History and criticism
English poetry--21st century--Appreciation.
English poetry--21st century--History and criticism.
Princeton subject headings:
English poetry--20th century--Appreciation.
English poetry--20th century--History and criticism.
English poetry--21st century--Appreciation.
English poetry--21st century--History and criticism.