Columbia subject headings:
Slavery in art--Congresses.
Slavery in literature--Congresses.
Slavery in motion pictures--Congresses.
Harvard subject headings:
Slavery in art--Congresses.
Slavery in literature--Congresses.
Slavery in motion pictures--Congresses.
Slavery--History--Congresses.
Princeton subject headings:
Slavery in art--Congresses.
Slavery in literature--Congresses.
Slavery in motion pictures--Congresses.
Slavery--History--Congresses.