Duchesne L., Mgr., D.D..
The Beginnings of the Temporal Sovereignty of the Popes. A.D. 754-1073 /
Authorised Translation from the French by Arnold Harris Mathew 
. - New York; Cincinnati; Chicago : Benziger Brothers,  1908 
. - xi, 312 p.  22 cm. 
 - ((The International Catholic Library;  Edited by Rev. J. )