Columbia subject headings:
Harvard subject headings:
Bilingualism--Europe, German-speaking--Congresses.
French language--Economic aspects--Europe, German-speaking--Congresses.
French language--Europe, German-speaking--Business French--Congresses.
Language and languages--Economic aspects--Europe, German-speaking--Congresses.
Princeton subject headings:
French language--Business French--Congresses.
French language--Europe, German-speaking--Congresses.