@book{UBHD-9506299, author={Petrus <Helias>}, publisher={Pontifical Inst. of Mediaeval Studies}, address={Toronto}, year={1993}, pages={XII, 594 S.}, language={eng and lat}, number={ARRAY(0x561e199c4350)}, series={Studies and texts}, note={Einl. engl., Text lat}, library={UB [Signatur: 95 A 2166::1]}, }