Columbia subject headings:
Logic--Congresses.
Ontology--Congresses.
Representation (Philosophy)--Congresses.
Truth--Congresses.
Harvard subject headings:
Logic--Congresses
Ontology--Congresses.
Representation (Philosophy)--Congresses.
Truth--Congresses
Princeton subject headings:
Logic--Congresses.
Ontology--Congresses.
Representation (Philosophy)--Congresses.
Truth--Congresses.