Betten, Francis S., S.J..
St. Boniface and St. Virgil: A Study from the History of Two Supposed Conflicts /

. - Washington : St. Anselm's Priory,  1927 
. - 76 p.  23 cm. 
 - ((Benedictine Historocal Monographs) )
<br/>К.: Бібл.