Columbia subject headings:
Generative grammar.
German language--Grammar, Generative.
German language--Grammar, Historical.
German language--Syntax.
Linguistic change.
Harvard subject headings:
Generative grammar.
German language--Grammar, Generative.
German language--Grammar, Historical.
German language--Syntax.
Linguistic change.
Princeton subject headings:
German language--Grammar--Theory, etc.
Structural linguistics.