Columbia subject headings:
Harvard subject headings:
English language--Old English, ca. 450-1100--Auxiliary verbs.
English language--Old English, ca. 450-1100--Versification
English poetry--Old English, ca. 450-1100--History and criticism
Princeton subject headings:
English language--Old English, ca. 450-1100--Auxiliary verbs.
English language--Old English, ca. 450-1100--Versification.
English poetry--Old English, ca. 450-1100--History and criticism.