Codex epistolaris Carolinus

Codex epistolaris Carolinus : letters from the popes to the Frankish rulers, 739-791. Translated with an introduction and notes by Rosamond McKitterick ... [et al.]. 1st ed. Liverpool : Liverpool University Press, 2021. x, 532 s. Translated texts for historians, Volume 77. ISBN 978-1-80034-871-4.