The concept of Heresy in the Middle Ages  11th-13th c. : proceedings of the international conference held at Louvain on May 13-16, 1973; edited by W. Lourdaux and D. Verhelst 

 - Leuven  Leuven University Press  1976 
 - viii, 232 p.  25 cm. 
<br/><br/> Translated from the French 
<br/><br/><label>ISBN: </label>9061860431 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heresy--History<br/>Christian heresies--History--Middle Ages, 600-1500es
<br/><br/><label>Dewey Class. No.: </label>270.09