Firenze, Biblioteca Laurenziana, Santa Croce IV sin. 2, fol. 239r-253v at 241r, Graz, Universiätsbibl. 138, fol. 246v-268r "Proto-Quarta"

Firenze, Biblioteca Laurenziana, Santa Croce IV sin. 2, fol. 239r-253v at 241r The Florence manuscript omits 18 decretals that Johannes added later to Compilatio quarta.  The Graz manuscript includes the 18 decretals.