Columbia subject headings:
Harvard subject headings:
African language--Grammar, Comparative--German.
Asian language--Grammar, Comparative--German.
European language--Grammar, Comparative--German.
German language--Grammar, Comparative--African.
German language--Grammar, Comparative--Asian.
German language--Grammar, Comparative--European.
Language and culture.
Princeton subject headings:
Contrastive linguistics.
Grammar, Comparative and general.