The correspondence of Pope Gregory VII :  selected letters from the Registrum / 
translated with an introduction by Ephraim Emerton. 
 - New York :  Norton,  1969 
 - xxxi, 212 p. ;  21 cm. 
 - Records of civilization, sources and studies .
<br/><br/>Bibliography: p. 196-197. 
<br/><br/> Open access. 
<br/><br/><label>LCCN: </label>708470  
<br/><br/><label>Subjects--Personal Names: </label><br/>Emerton, Ephraim, 1851-1939, ed. & tr.