Columbia subject headings:
Germanic languages--Grammar, Historical.
Germanic languages--Morphology.
Germanic languages--Tense.
Germanic languages--Verb.
Harvard subject headings:
Germanic languages--History.
Germanic languages--Morphology.
Germanic languages--Tense.
Germanic languages--Verb.
Princeton subject headings:
Germanic languages--History.
Germanic languages--Morphology.
Germanic languages--Tense.
Germanic languages--Verb.