Columbia subject headings:
Civilization--History--Congresses.
Historiography--Congresses.
History--Periodization--Congresses.
Interdisciplinary research--Congresses.
Harvard subject headings:
Civilization--History--Congresses.
Historiography--Congresses
History--Periodization--Congresses.
Interdisciplinary research--Congresses.
Princeton subject headings:
Civilization--History--Congresses.
Historiography--Congresses.
History--Periodization--Congresses.
Interdisciplinary research--Congresses.