Person Petrus Petrus PisanusPetrus Petrus Pisanus bei Weidmannsche Hildesheim Grammatical Works Attributed to Peter of Pisa, Charlemagne's TutorEdited by Elke Krotz and Michael M. Gorman, with an introduction by Michael M. Gorman.Petrus Petrus PisanusWeidmannsche HildesheimSoftcover2014