J. Joseph Ryan, Saint Peter Damiani and his canonical sources. A preliminary Study in the Antecedents of the Gregorian Reform. Pontifical Institute of Mediaeval Studies
1957 ◽
Vol 43
(1)
◽
pp. 359-361
2018 ◽
1967 ◽
Vol 25
◽
pp. 180-181
1988 ◽
Vol 46
◽
pp. 322-323
1990 ◽
Vol 48
(3)
◽
pp. 834-835
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