Columbia subject headings:
Harvard subject headings:
Grammar, Comparative and general--History.
Grammar, Comparative and general.
Princeton subject headings:
German language--History.
German literature--History and criticism.
Grammar, Comparative and general--Morphology.
Grammar, Comparative and general--Phonology.
Grammar, Comparative and general--Syntax.
Machine translating.
Semantics, Comparative.
Translating and interpreting.