Columbia subject headings:
Classical languages--Grammar--Congresses.
Classical literature--History and criticism--Congresses.
Language and languages--Philosophy--Congresses.
Harvard subject headings:
Classical languages--Grammar--Congresses.
Classical literature--History and criticism--Congresses
Language and languages--Philosophy--Congresses
Princeton subject headings:
Grammar, Comparative and general--Congresses.
Language and languages--Philosophy--Congresses.