Columbia subject headings:
Literature, Medieval--Congresses.
Ontology--History--To 1500--Congresses.
Philosophy, Medieval--Congresses.
Philosophy--History--To 1500--Congresses.
Harvard subject headings:
Literature, Medieval--Congresses.
Ontology--History--Congresses.
Philosophy, Medieval--Congresses.
Time--Philosophy--History--Congresses.
Princeton subject headings:
Literature, Medieval--Congresses.
Ontology--History--Congresses.
Philosophy, Medieval--Congresses.
Time--Philosophy--History--Congresses.