Columbia subject headings:
English language--Old English, ca. 450-1100--Grammar, Comparative--Germanic.
English language--Old English, ca. 450-1100--History.
Germanic languages--Grammar, Comparative--English (Old English)
Germanic languages--History.
Grammar, Comparative and general--Morphology.
Grammar, Comparative and general--Phonology.
Harvard subject headings:
English language--Old English, ca. 450-1100--Grammar, Comparative--Germanic.
English language--Old English, ca. 450-1100--History.
Germanic languages--Grammar, Comparative--Anglo-Saxon.
Germanic languages--History.
Grammar, Comparative and general--Morphology.
Grammar, Comparative and general--Phonology
Princeton subject headings:
English language--Old English, ca. 450-1100.
Germanic languages.