Columbia subject headings:
Harvard subject headings:
German language--Grammar, Comparative--Spanish.
German language--Grammar--Theory, etc.
German language--Semantics.
German language--Syntax.
Spanish language--Grammar, Comparative--German.
Princeton subject headings:
German language--Grammar, Comparative--Spanish.
German language--Grammar--Theory, etc.
German language--Semantics.
German language--Syntax.
Spanish language--Grammar, Comparative--German.