Columbia subject headings:
Grammar, Comparative and general--Verb--Congresses.
Reference (Linguistics)--Congresses.
Harvard subject headings:
Grammar, Comparative and general--Agreement--Congresses.
Grammar, Comparative and general--Switch-reference--Congresses.
Grammar, Comparative and general--Verb--Congresses.
Reference (Linguistics)--Congresses.
Typology (Linguistics)--Congresses.
Princeton subject headings:
Grammar, Comparative and general--Agreement--Congresses.
Grammar, Comparative and general--Switch-reference--Congresses.
Grammar, Comparative and general--Verb--Congresses.
Typology (Linguistics)--Congresses.