Columbia subject headings:
Historiography--Congresses.
History--Archival resources--Congresses.
History--Research--Congresses.
Harvard subject headings:
Historiography--Congresses
History--Archival resources--Congresses.
History--Research--Congresses.
Princeton subject headings:
Historiography--Congresses.
History--Archival resources--Congresses.
History--Research--Congresses.