Columbia subject headings:
Harvard subject headings:
German language--Grammar, Comparative--Romance languages--Congresses.
Romance languages--Grammar, Comparative--German--Congresses.
Princeton subject headings:
Contrastive linguistics.
French language--Grammmar, Comparative--German.
German language--Grammar, Comparative--French.
German language--Grammar, Comparative--Portuguese.
German language--Grammar, Comparative--Spanish.
Portuguese language--Grammar, Comparative--German.
Spanish language--Grammar, Comparative--German.