Columbia subject headings:
Gregory I, Pope, approximately 540-604.
Latin language, Postclassical.
Latin language--Metrics and rhythmics.
Harvard subject headings:
Gregory I, Pope, approximately 540-604
Latin language, Postclassical
Latin language--Metrics and rhythmics.
Princeton subject headings:
Gregory I, Pope, approximately 540-604.
Latin language, Postclassical.
Latin language--Metrics and rhythmics.