Columbia subject headings:
Harvard subject headings:
American poetry--20th century--History and criticism
English poetry--20th century--History and criticism
Whitman, Walt, 1819-1892
Whitman, Walt, 1819-1892--Criticism and interpretation.
Princeton subject headings:
American poetry--20th century--History and criticism.
English poetry--20th century--History and criticism.
Whitman, Walt, 1819-1892.