Columbia subject headings:
Field theory (Linguistics)
Grammar, Comparative and general--Aspect.
Grammar, Comparative and general.
Semantics.
Harvard subject headings:
Field theory (Linguistics)
Grammar, Comparative and general--Aspect.
Grammar, Comparative and general--Tense.
Semantics.
Princeton subject headings:
Field theory (Linguistics)
Grammar, Comparative and general--Aspect.
Grammar, Comparative and general.
Semantics.