Columbia subject headings:
Whitman, Walt, 1819-1892--Criticism and interpretation--Congresses.
Whitman, Walt, 1819-1892. Leaves of grass--Congresses.
Harvard subject headings:
Utopias in literature--Congresses.
Whitman, Walt, 1819-1892--Appreciation--Europe--Congresses.
Whitman, Walt, 1819-1892--Knowledge--America--Congresses.
Whitman, Walt, 1819-1892--Language--Congresses.
Whitman, Walt, 1819-1892. Leaves of grass--Congresses.
Princeton subject headings:
Whitman, Walt, 1819-1892--Criticism and interpretation--Congresses.
Whitman, Walt, 1819-1892. Leaves of grass--Congresses.