Columbia subject headings:
Harvard subject headings:
Communication in politics--Congresses.
Language and languages--Political aspects--Congresses
Language and languages--Usage--Congresses.
Linguistic change--Europe, Central--Congresses.
Linguistic change--Europe, Eastern--Congresses.
Princeton subject headings:
Communication in politics--Congresses.
Language and languages--Political aspects--Congresses.
Language and languages--Usage--Congresses.
Linguistic change--Europe, Central--Congresses.
Linguistic change--Europe, Eastern--Congresses.