Columbia subject headings:
Grammar, Comparative and general--Interrogative--Congresses.
Information storage and retrieval systems--Congresses.
Language and logic--Congresses.
Semantics--Congresses.
Harvard subject headings:
Grammar, Comparative and general--Interrogative--Congresses.
Information storage and retrieval systems--Congresses
Language and logic--Congresses.
Semantics--Congresses
Princeton subject headings:
Grammar, Comparative and general--Interrogative--Congresses.
Information storage and retrieval systems--Congresses.
Language and logic--Congresses.
Semantics--Congresses.