Petrus venerabilis 1156-1956 :
Petrus venerabilis 1156-1956 : Studies and texts commemorating the eigth centenary of his death /
edited by Giles Constable and James Kritzeck
- Roma : Herder, 1956
- X, 255 S. : Ill. ; 25 cm
- Studia anselmiana ; Fasc. XL .