Columbia subject headings:
American poetry--20th century--History and criticism.
American poetry--20th century.
English poetry--20th century--History and criticism.
English poetry--20th century.
Harvard subject headings:
American poetry--20th century
American poetry--20th century--History and criticism
English poetry--20th century
English poetry--20th century--History and criticism
English-speaking countries--Intellectual life--20th century
Princeton subject headings:
American poetry--20th century--History and criticism.
American poetry--20th century.
English poetry--20th century--History and criticism.
English poetry--20th century.