1. Gregorii I Papae Registrum epistolarum Author/Creator: Gregory I, Pope, approximately 540-604, author Publication/Creation: [Getzville, New York] : William S. Hein & Company, [2018] Resource Type: Book Access & Availability: Loading
2. Gregorii I papae Registrum epistolarum Author/Creator: Gregory I, Pope, approximately 540-604 Publication/Creation: Berolini : Apud Weidmannos, 1887-1899 Resource Type: Book Access & Availability: Loading
3. Gregorii I papae Registrum epistolarum Author/Creator: Catholic Church. Pope (590-604 : Gregory I) Publication/Creation: München : Monumenta Germaniae Historica, 1992 Resource Type: Book Access & Availability: Loading