@Book{BVMC:619734, author = {Gregorio I, Papa, Santo}, title = {Liber pastoralis Divi Gregorij Magni Pontificis Summi Sanctaeque Ecclesiae Doctoris}, url = {https://www.cervantesvirtual.com/obra/liber-pastoralis-divi-gregorij-magni-pontificis-summi-sanctaeque-ecclesiae-doctoris} }