Please note that your choice of borrowing branch library affects which collection points you will be offered when ordering or reserving items. It is also relevant for deciding the loan status of items ('for loan', 'for order', etc.)
Petrus <Helias>: Summa super Priscianum / Petrus Helias. Ed. by Leo Reilly. - Toronto: Pontifical Inst. of Mediaeval Studies, 19XX-, ISBN 978-0-88844-113-3 (Studies and texts / Pontifical Institute of Mediaeval Studies ; 113)