Columbia subject headings:
Archaeology and history--Congresses.
Colonies--History--Congresses.
Slavery--History--Congresses.
Harvard subject headings:
Archaeology and history--Congresses.
Colonies--History--Congresses.
Slavery--History--Congresses.
Princeton subject headings:
Archaeology and history--Congresses.
Colonies--History--Congresses.
Slavery--History--Congresses.