Columbia subject headings:
Harvard subject headings:
Idéologues (French philosophers)--Congresses.
Language and languages--Philosophy--Congresses
Language policy--France--History--Congresses.
Linguistics--France--History--Congresses.
Princeton subject headings:
Idéologues (French philosophers)--Congresses.
Language and languages--Philosophy--Congresses.
Language policy--France--History--Congresses.
Linguistics--France--History--Congresses.