Columbia subject headings:
Harvard subject headings:
Grammar, Comparative and general--Grammaticalization--Congresses.
Grammar, Comparative and general--Morphology--Congresses.
Language and languages--Foreign elements--Congresses.
Languages in contact--Congresses.
Princeton subject headings:
Grammar, Comparative and general--Grammaticalization--Congresses.
Languages in contact--Congresses.
Linguistic change--Congresses.
Linguistics--Congresses.