Columbia subject headings:
Harvard subject headings:
Europe--Historiography--Congresses.
Europe--History--476-1492--Congresses.
Intention--History--Congresses.
Motivation (Psychology)--History--Congresses.
Princeton subject headings:
Europe--Historiography--Congresses.
Europe--History--476-1492--Congresses.
Intention--History--Congresses.
Motivation (Psychology)--History--Congresses.