Columbia subject headings:
Otfrid, von Weissenburg, active 9th century. Evangeliorum liber--Indexes.
Harvard subject headings:
Otfrid, von Weissenburg, active 9th century. Evangeliorum liber--Indexes.
Princeton subject headings:
Otfrid, von Weissenburg, active 9th century. Evangeliorum liber--Concordances.