Columbia subject headings:
American poetry--20th century--Themes, motives.
English poetry--20th century--Themes, motives.
Harvard subject headings:
American poetry--20th century--Themes, motives.
English poetry--20th century--Themes, motives.
Princeton subject headings:
American poetry--20th century--Themes, motives.
English poetry--20th century--Themes, motives.