Noble, Thomas F. X..
The Republic of St. Peter: the birth of the Papal State, 680-825 /
Thomas F.X. Noble 
. - Philadelphia : University of Pennsylvania Press,  1984 
. - xxxix, 374 p.  ill., map.  24 cm. 
 - (The Middle Ages )
<br/>К.: Бібліогр. : c. 337-363, Index 
<br/><label>  ISBN: </label>0-8122-7917-4