Columbia subject headings:
Slavic languages--Grammaticalization--Congresses.
Slavic languages--Lexicology--Congresses.
Harvard subject headings:
Slavic languages--Grammaticalization--Congresses.
Slavic languages--Lexicology--Congresses.
Princeton subject headings:
Slavic languages--Grammaticalization--Congresses.
Slavic languages--Lexicology--Congresses.